Stone Mate
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User manual

Welcome to Stone Mate: a digital notebook for writing mathematics. You do not need to know much about computers.

With Stone Mate you can:

  • write formulas with a few keys (fractions, roots, powers…)
  • add text (titles, explanations, bold…)
  • insert graphs, drawings, and sign charts
  • recognize formulas from a photo, a PDF, or a region of the screen
  • save, print, or export to Word and PDF
  • use the interface in Italian, English, French, or Spanish (or follow the system language)

Watch Stone Mate in 4:05

A tour of the program: you write the mathematics, and you do the steps yourself.

Chapter 1

Before you start

When you open a new piece of work, Stone Mate asks for:

  • your first name and last name
  • a document title (for example Equation exercises – 12 March)

Fill in the three fields and confirm: you are on a blank page, ready to write. The window opens full screen (maximized).

The "New session Stone Mate" window, with the line "Before you start, enter the author and document title.", First name "Mario", Last name "Rossi", Document title "Equation exercises — March 12", and the Cancel and Continue buttons.
At startup Stone Mate asks for your name and a document title.

The first time you open the program, the About Stone Mate window also appears (version, contact, license, and a link to the site). It does not come back on its own after that: you will find it under Help → About Stone Mate….

The "About Stone Mate" window, with the diamond icon, Version 1.2.0, Author: Matteo Pietri, the link https://stonemate.petrastudio.dev/, the line "Math formula editor with A4 sheet, graphs and GeoGebra.", and the Contacts, License and use, and Credits sections (GeoGebra, Ollama), plus OK.
The About Stone Mate window (Help → About Stone Mate…).

Tip: the title helps you find the file later, and it shows up in recent documents.

Chapter 2

How the window is laid out

Think of a notebook open on the computer.

WhereWhat it is for
Top menuFile, Edit, View, Settings, Help
Bar under the menuChoose what you want to do: formulas, text, graph, drawing, signs, recognition from an image
Left panel (Templates)Formulas already set up, ready to click (equations, limits, systems…)
Page in the centerWhere you write, as on paper
Right panelAppears when you work on a graph, a drawing, or a sign chart
Bottom barHelpful messages, and a preview line of the formula
The Stone Mate window full screen: File, Edit, View, Settings, and Help menus; Base, Greek, Log, Trig, Analysis, Symbols, Logic, and Matrices tabs, plus Text, Graph, Draw, Signs, and OCR; Base tab buttons and the Most used row; on the right New, Duplicate, Delete, 150% zoom, Separator, and Calculator; the Templates panel on the left; in the center an A4 page dated 18/10/2026 with the name Mario Rossi, the title "Equation exercises – 12 March", the heading "Linear and quadratic equations", the formulas 2x+3=7 and x²−5x+6=0, and a drawing on the Cartesian plane; the status bar at the bottom with the LaTeX code.
The main window: menu, tab bar, Most used row, Templates panel, A4 page, and the bar at the bottom.

At the bottom right (or next to the zoom) you can zoom in or zoom out on the page.

Chapter 3

Create, open, and save

File menu

You want to…Do this
Start from scratchFile → New (or Ctrl+N)
Reopen a piece of workFile → Open… (or Ctrl+O)
Reopen something recentFile → Recent documents
SaveFile → Save (or Ctrl+S)
Save under another nameFile → Save as…
Get a Word fileFile → Export Word…
Get a PDFFile → Export PDF…
PrintFile → Print… (or Ctrl+P)
The File menu open, with New (Ctrl+N), Open… (Ctrl+O), Recent documents, Save (Ctrl+S), Save as… (Ctrl+Shift+S), Export Word…, Export PDF…, Print… (Ctrl+P), and Exit (Alt+F4).
The File menu: new, open, recent documents, save, export to Word or PDF, print.
The "Save changes?" window, with the text "Save changes to “Equation exercises – 12 March” before exiting?" and the Cancel, Don't save, and Save buttons.
If you close with unsaved changes, Stone Mate asks whether to save them.

File format

Stone Mate work is saved with the extension .smate. That is the “full” format: you can reopen the file and keep editing formulas and text.

Word and PDF are useful for handing work in or printing, but keep the .smate file if you want to continue working.

Organizing rows

You want to…Do this
An empty formula lineThe New button (or Edit → New line)
Start a new line under a formula you already wrotePress Enter: an empty row appears underneath. To copy the row, use Ctrl+D
Separate two exercisesEdit → Separator (a horizontal line; you can type a label on it)
Copy the current lineCtrl+D
Delete the lineCtrl+Shift+Delete (or the Edit menu)
Move the line up or downAlt+↑ / Alt+↓
Undo / redoCtrl+Z / Ctrl+Y
The Edit menu open, with Undo (Ctrl+Z), Redo (Ctrl+Y, disabled), Copy (Ctrl+C), Paste (Ctrl+V), New line, Separator, Duplicate (Ctrl+D), Delete line… (Ctrl+Shift+Delete), Move line up (Alt+↑), and Move line down (Alt+↓, disabled).
The Edit menu: new row, separator, duplicate, delete, and move rows.
A page with three formulas, a horizontal separator line, and below it the formula 2x+1=5 being edited.
A separator splits two exercises on the page.
Part of the page with the heading "Linear and quadratic equations", the formula 2x+3=7, an empty formula row highlighted in orange with a single slot underneath, then the formula x²−5x+6=0.
Enter on a formula you already wrote creates an empty row just below it. To copy the row, use Ctrl+D.
Chapter 4

Writing a formula

  1. Click a formula row (or create one with New).
  2. Type letters and numbers as usual.
  3. Use the special keys (or the buttons) for fractions, powers, roots…
A formula row highlighted in orange: a₁ equals a fraction with (x²+1) in the numerator and the square root of 2 in the denominator; the subscript slot is active.
A formula being edited: the active slot is highlighted.

The keys you will use most

Stone Mate looks at the character, not at a fixed physical key. On a US keyboard the positions below are the usual ones. On an Italian keyboard, / is Shift+7 and ^ is Shift+ì.

To get…PressExample
A fraction/Type a, then /, then b → the fraction a/b
A superscript^ (Shift+6 on a US keyboard)Type x, then ^, then 2 → x²
A subscript_ (Shift+-)Type a, then _, then 1 → a₁
The × sign*
Parentheses( … )
Brackets[ … ]
A system (brace){Use ↑ and ↓ to move from one equation to the other
Equals=
A square rootCtrl+R
Strike through a pieceCtrl+Shift+X or the x̸ buttonSelect the piece first, or strike the term on the left
A formula row with a system of two equations, x+y=5 and x−y=1, joined by a curly brace.
A system with a brace: use ↑ and ↓ to move from one equation to the other.
The Analysis tab active, with the strike-through button □̸ (Ctrl+Shift+X) at the start of the button row and on the Most used row; on the page the formulas 2x+3=7, x+1=0, the limit as x→2 of x+1, x²−5x+6=0, and, in the row being edited, x+3 followed by a struck-through 3 and then =5.
A term struck through to show a simplification (the □̸ button, or Ctrl+Shift+X).

Moving around inside a formula

A formula is made of slots. To move from one to another:

  • forward: Tab or the right arrow
  • back: Shift+Tab or the left arrow
  • inside a fraction: up / down arrow (numerator / denominator)

Buttons on the bar

Above the page you will find these tabs:

  • Basefractions, powers, parentheses, roots, +, −, ÷, =
  • Greekα, β, π, Δ…
  • Loglog, ln, eˣ…
  • Trigsin, cos, tan…
  • Analysissums, integrals, limits, derivatives (only so you can write them; the program does not evaluate them)
  • Symbols≤, ≥, ≠, ∞…
  • Logic∧, ∨, ⇒…
  • Matricessystems and matrices

Under those is the Most used row: the symbols you use most often. You can also call them with Ctrl+1 … Ctrl+9.

The tab bar with Base active; buttons a/b (/), xⁿ (^), xₙ (_), · (*), ( ), [ ], { …, | | (Ctrl+|), √ (Ctrl+R), ⁿ√, =, +, −, ÷; on the Most used row the lim and strike-through □̸ (Ctrl+Shift+X) buttons.
The Base tab and, under it, the Most used row.
The Greek tab active, with the letters α, β, γ, δ, ε, θ, λ, μ, σ, φ, ω, Δ, Σ, Π, Ω, Θ, Λ, Φ.
The Greek tab.
The Log tab active, with log, ln, logarithm in base a, and eˣ.
The Log tab: logarithms and exponentials.
The Trig tab active, with sin, cos, tan, arcsin, arccos, and arctan.
The Trig tab: trigonometric functions.
The Analysis tab active, with the strike-through button □̸ (Ctrl+Shift+X), Σ…, Π…, ∫…, lim, →a⁺, →a⁻, →+∞, →−∞, +∞, −∞, 0/0, ∞/∞, 0·∞, ∞−∞, 1^∞, y=…, x=…, d/dx, f₁, f₂, n!; on the Most used row only the lim button.
The Analysis tab: sums, integrals, limits, indeterminate forms, and derivatives to write down (Stone Mate does not evaluate them).
The Symbols tab active, with f₁, f₂, π, ±, ≤, ≥, ≠, ∞, +∞, −∞, ≈, and an arrow.
The Symbols tab.
The Logic tab active, with ∧, ∨, ⊕, ¬, ⇒, ⇔, ∀, ∃, ∃!, ⊤, ⊥, ⊼, ⊽.
The Logic tab.
The Matrices tab active, with { 2 eq, { 3 eq, { 4 eq, ( ) 2×2, ( ) 3×3, [ ] 2×2, [ ] 3×3, ( ) 2×3, ( ) 3×2; on the Most used row √ (Ctrl+R), π, ≤, ≥, ≠, ∞, log, sin, lim.
The Matrices tab: systems and matrices already set up.

Copy and paste

  • Copy (Ctrl+C): copies the selected text or formula.
  • Paste (Ctrl+V): if the clipboard holds text, it pastes it; if it holds an image with a formula, Stone Mate tries to recognize it; otherwise it inserts the image.

You can also drag an image onto an empty row. Right-click a formula to strike it through, copy it, or add it to the formula sheet.

The context menu on a formula row, with Strike through term (simplify), Add row, Insert separator, Copy, Paste, Duplicate, Delete line…, Add to formula sheet, Insert template, and Insert symbol.
Right-click a formula to strike it through, copy it, or add it to the formula sheet.
Chapter 5

Adding text

Useful for titles, instructions, and explanations in words.

  1. Press Text on the bar.
  2. Write as you would in a word processor.
  3. With Enter you start a new line inside the same text box.
Button / keyEffect
Bold button, or Ctrl+BBold
Italic button, or Ctrl+IItalic
Underline button, or Ctrl+UUnderline
Font and size menusChange the typeface and the size
Title / NormalLarge text or normal text
⇤ / ↔Align left or center
The Text bar with the Georgia font menu, a size menu, the bold, italic, and underline buttons, Title, Normal, and two alignment buttons; on the page the line "Exercise 1 first-degree equations" in bold, italic, and underline.
Text mode: typeface, size, bold, italic, underline, Title, Normal, and alignment.

To go back to formulas: click a formula row, or press New.

Chapter 6

Ready-made formulas (templates)

On the left, the Templates panel (if you cannot see it: View → Template panel).

  1. Choose a topic (Equations, Systems, Limits, Trigonometry…).
  2. Click the formula you want: it appears on the page with slots to fill in.

Typical examples: a quadratic equation, a two-equation system, a limit as x tends to infinity, a trigonometric identity.

The Templates panel with the Equations topic (1st degree equation, 2nd degree equation, Equality, Proportion) and, on the page, the 2nd degree equation inserted with three empty slots.
The Templates panel on Equations: the formula appears with slots to fill in.

Your formulary

If you have written a formula you want to reuse:

  1. Right-click the formula → Add to formula sheet.
  2. You will find it under the Formulary topic.
  3. You can reorder the entries by dragging them in the list.
The Templates panel with the Formulary topic, containing the formula a₁ = (x²+1)/√2 added by the user.
Your formulary: formulas saved with Add to formula sheet, under the Formulary topic.
Chapter 7

Graphs (GeoGebra)

Graph mode opens the Cartesian plane panel on the right.

Important: Stone Mate does not plot a function from an expression on its own (y = f(x)). There is no automatic plot.

For a clean graph, use GeoGebra and then import it onto the page:

  1. Press Graph (or View → GeoGebra).
  2. In the panel, press GeoGebra: the site opens in your default browser.
  3. Build the graph in GeoGebra.
  4. Export a PNG image (or save a .ggb file).
  5. In Stone Mate press Import on the Graph tab, or Import PNG/.ggb in the panel, and choose the file: the graph appears on the page.
  6. After the import the side panel closes and you return to writing.
The Graph tab active, with GeoGebra and Import on the second row; on the right the "Cartesian plane" panel with the text "No automatic plot: open GeoGebra, export PNG/.ggb and import. To sketch a parabola use Draw → Curve.", the GeoGebra and Import buttons, and the hint "Open GeoGebra, export PNG/.ggb, then Import. To draw by hand use Draw → Curve."; in the center the page with a title, 2x+3=7, x²−5x+6=0, and an empty row being edited.
Graph mode opens the Cartesian plane panel. From here you open GeoGebra and import the image you exported. Stone Mate does not draw graphs by itself.
The file chooser "Import from GeoGebra (PNG or .ggb)", with Recent, Home, Desktop, Trash, app-1.1, and Other Locations on the left, an empty file list, the "GeoGebra / image" filter, and the Open (disabled) and Cancel buttons.
Import PNG/.ggb: choose the PNG or .ggb file you exported from GeoGebra.
The View menu open, with Zoom + (Ctrl++), Zoom − (Ctrl+−), Zoom 100% (Ctrl+0), Show pages with a check mark, Template panel, GeoGebra, and Calculator.
The View menu: zoom, Show pages (on or off), Template panel, GeoGebra, Calculator.

Inserted graphs also go into Word, PDF, and printouts. For a parabola or another curve without an equation (a ready-made shape, or one drawn by hand), use Draw mode.

Chapter 8

Drawing on the plane (shapes, points, and intersections)

Draw mode — build figures on the Cartesian plane without showing formulas.

You can insert preset curves, segments, vectors, points, and mark intersections (axes, curves, lines) and values.

The panel opens on the right, with the tools and the plane (you can resize it by dragging the panel’s left edge). Above the plane there is a compact bar: on the left the Value / segment-or-vector label fields when needed; on the right the drawing Undo and Redo icons (no “History” title).

Draw tab with Select, Point, Line, Vector, Curve, New drawing, Insert into sheet, and shape icons; on the right the Draw on the plane panel with the Cartesian plane.
Draw mode: Select, Point, Line, Vector, Curve, and the shape icons, with the plane on the right.

What you can do

  • choose a ready-made shape from the icons (line, parabola, circle, …) — later inserts are offset so they do not stack on top of each other
  • or trace freehand with Curve (it recognizes the closest school shape)
  • draw segments (Line, two clicks) and vectors (Vector, two clicks, with an arrowhead)
  • place figures and points: drag control points, segments, vectors, or whole curves
  • define points and intersections and assign a Value (for example −1, 2) or a label on a segment/vector

Stone Mate does not show or ask for y = f(x): you work on the shape and the points, by hand.

Draw on the plane panel with a shape from the palette, control points, and blue dots at crossings.
A ready-made shape from the icons. Move and reshape it by dragging the control points.
Draw panel with the Value box and a labeled point on the plane.
Select a point, type a Value, and press Apply: the value appears next to the point.
Draw panel with a parabola recognized from a freehand stroke.
With Curve you trace freehand: the stroke is recognized as a school shape and redrawn cleanly.

A typical sequence

  1. Press Draw.
  2. Choose a shape (icons), Line / Vector, or Curve freehand.
  3. With Select (or a long click / drag on the figure), move points and curves until the position is right.
  4. Click the points or the intersections (blue dots) and assign the numeric Value (or the segment/vector label) with Apply.
  5. Press Insert into sheet: the drawing becomes an image in the document and the panel closes.
Sheet with a Cartesian-plane drawing inserted as an image.
Insert into sheet turns the drawing into an image in the document.

Tools

ToolWhat it does
SelectSelect and drag points, segments, vectors, or whole curves. It also turns on automatically in some gestures (see below)
PointOne click = a point (you can then give it a value, for example −1)
LineTwo clicks = a segment. The second click can finish on an existing point (including one from another segment)
VectorTwo clicks = a vector (segment with an arrowhead); you can label it like lines
CurveDrag freehand: the stroke is recognized as a school shape and redrawn cleanly. If it is not recognized, it stays as a freehand stroke
Shape iconsPalette of preset curves and figures (icons only, no title): Line, Parabola, Circle, Ellipse, Rectangle, Square, Sine, Cosine, Exponential, Logarithm, Hyperbola, Absolute value, Cubic. Each later insert is offset so shapes do not stack
Undo / RedoIn the bar above the plane: undo or redo the last drawing action (also Ctrl+Z / Ctrl+Y / Esc while Draw is active)
New drawingClears the whole drawing (after you confirm)
Delete curveDeletes the selected curve and its points (after you confirm). The Delete key does the same when a curve is selected
Insert into sheetPuts the drawing in the document (as an image) and closes the panel

Clicks, selection, and drawing (Line / Vector)

  • First click of a line or vector: you start the stroke. Until the second click, nothing else is selected — every click is for finishing the segment.
  • Short click on an existing point: starts or finishes the line/vector on that point (does not switch to Select).
  • Long click (or a clear drag) on a segment or curve, when you are not finishing a stroke: switches to Select so you can move the figure.
  • Click on a curve with other tools (for example Point): selects/moves the curve.
  • Clicking the active create tool again (Point, Line, Vector, Curve) toggles back to Select.

Position, values, and intersections

  • Every shape has control points (vertex, ends, centers…): drag them to move and resize the figure on the plane.
  • A click on a point (without a long drag) opens the Value field in the bar above the plane — type for example −1 and press Apply (or Enter).
  • On a selected segment or vector you can set a label (same bar).
  • If you drag a point to move it, the Value box does not open.
  • Blue dots at intersections:
    • curves with the axes and between curves;
    • lines/vectors with the axes, with each other, and with curves (including several points for the same pair, e.g. a chord and a circle).
  • If you move a line or a curve, the intersection dots update and follow the crossing.

Tip: to delete a shape, select it (click the curve) and use Delete curve or Delete.

Chapter 9

Sign chart

Signs mode — draw the sign-chart table or axis by hand. The panel with the layout opens on the right (you can resize this panel too).

Important: Stone Mate does not work out the signs for you. It gives you the layout to fill in by hand.

The layout:

  • at the top, the functions (rows separated by a dashed line)
  • in the middle, the axis: the columns sit on the axis (numeric or symbolic labels, for example −2, 0, a)
  • underneath, the result f(x) (the continuous sign of the product)

The dots ● / ○ go at the row×column crossings (not on the axis):

  • ● = a root (a zero)
  • ○ = a discontinuity
  • absent = no symbol at that crossing

On the axis you only move and label the columns.

ToolUse
ColumnAdds a column on the axis; then edit the label and press Apply
MoveDrag the columns along the axis
LabelEdit the names (column or function); confirm with Apply
+ function / − functionAdd or remove a function row
Click a row×column crossingCycles the dot ● / ○ / absent
Click the cells between columnsCycles the signs + and −
DeleteDeletes the selected column (also with Delete)
Undo / ClearUndoes the last change, or clears the whole chart
Insert into sheetPuts the chart in the document and closes the panel
The "Sign chart" panel with the text "Functions above, axis in the center, f(x) below = result. Columns on the axis; ●/○ at row×column junctions. +/− signs by hand.", the Column, Move, Label, + function, − function, Delete, Undo, and Clear buttons, a field containing 3 and Apply, Insert into sheet, the message "Column ○ (discontinuity)", and the layout with rows f₁ and f₂, the x axis with columns 2 and 3, a filled dot on f₁ at 2, an open dot on f₂ at 3, and an empty f(x) row.
Signs mode: the sign-chart layout, for you to fill in by hand.
Chapter 10

Taking a formula from a photo or the screen

OCR mode — “reads” a formula or some text from an image.

ButtonWhen to use it
From File…You have a PNG/JPG photo or a PDF
From clipboardYou have already copied an image
From screen…You want to select a rectangle on the screen
The OCR tab, with From File…, From clipboard, and From screen…, and the "Allow download for OCR?" window already open over the page. The status bar reads "OCR unavailable: download not authorized".
Opening the OCR tab brings up Allow download for OCR? at once. The bar shows From File…, From clipboard, and From screen….

From a file

  1. Choose the image or the PDF.
  2. If it is a PDF, say which page to start from and which to end on.
  3. Wait a moment: an editable formula appears, or a text row.

From the screen

  1. Press From screen….
  2. Drag a rectangle over the area you want to capture.
  3. When you release, recognition starts.

What it needs in order to work

Recognition uses a helper program on the computer (usually Ollama with a dedicated model).

  • If it is missing, Stone Mate asks permission as soon as you open the OCR tab, before downloading and installing it (the download can be over 1 GB).
  • During the download you see the progress in the bottom bar.
  • If you do not allow it, or something is not ready, a message appears at the bottom: you can still write by hand.
The "Allow download for OCR?" window: OCR needs Ollama and the glm-ocr:q8_0 model, the download is more than 1 GB, and the buttons are Cancel and Download and install. If you decline, OCR will be unavailable.
If the OCR helper is missing, Stone Mate asks permission before downloading it (over 1 GB).
The same OCR screen as the figure above: the "Allow download for OCR?" window is open, and the status bar reads "OCR unavailable: download not authorized".
The same screen as the OCR tab above. The status bar reads “OCR unavailable: download not authorized.”

If the result is not perfect, correct the slots as you would in a normal formula.

Chapter 11

Zooming and seeing the pages

WhatHow
Zoom in / zoom outZoom + / Zoom −, or Ctrl++ / Ctrl+−, or Ctrl + the mouse wheel
Back to 100%Ctrl+0
See where the page endsView → Show pages (dashed lines, as in a printout)
The computer’s calculatorView → Calculator
The full list of commandsHelp → Quick commands…
About the programHelp → About Stone Mate… (version, email, license, link to the site)
The page with the label "page 1" in the center after turning on View → Show pages.
With Show pages, the sheet marks the printed pages.
The Stone Mate "Quick commands" page: an introduction to the keyboard and to combinations you can change under Settings → Keyboard shortcuts…, the "Formulas — Italian keyboard" table (fraction, superscript, subscript, multiplication ·, parentheses, brackets, system, equals, square root Ctrl+R, absolute value Ctrl+|, strike-through Ctrl+Shift+X, Most used bar Ctrl+1 … Ctrl+9), and the start of the document table. The page title is Quick commands manual.
Help → Quick commands…: the full list of shortcuts.
Chapter 12

Appearance, language, and shortcuts

The Settings menu open, with Preferences… and Keyboard shortcuts…, above the Base tab bar and the Most used row.
The Settings menu: Preferences… and Keyboard shortcuts….

Preferences (appearance and language)

Settings → Preferences…

Here you can:

  • choose the interface language
  • change the default character size
  • change the space between one row and the next
  • choose which buttons to show on the bar (hide the ones you do not use)

Keyboard shortcuts

Settings → Keyboard shortcuts…

You can change the Ctrl / Alt / Shift combinations (document, page, text, square root, strike-through, Most used slots Ctrl+1…9, and so on).

  • The list shows the action, the current key, Change, and Reset.
  • With Change, press the new combination on the keyboard (you need at least one modifier: Ctrl, Alt, or Shift).
  • If that combination is already used by another command, Stone Mate tells you, and you can reassign it (it is taken away from the other command) or cancel.
  • Reset all goes back to the factory values.
  • The formula characters (/, ^, _, *, (, [, {, =) are not customizable: they follow the keyboard layout.
  • In the menus and in Quick commands the keys are shown as Shift and Delete (on an Italian keyboard those keys are printed Maiusc and Canc).

Changes are kept from one session to the next. After you apply them, Help → Quick commands… lists the updated keys as well.

The "Keyboard shortcuts" window, listing New document (Ctrl+N), Open (Ctrl+O), Save (Ctrl+S), Save as (Ctrl+Shift+S), Print (Ctrl+P), Undo (Ctrl+Z), Redo (Ctrl+Y), Copy (Ctrl+C), Paste (Ctrl+V), Select all (line) (Ctrl+A), then the Sheet section with Duplicate expression (Ctrl+D) and Delete line (Ctrl+Shift+Delete), each with Change and Reset; at the bottom Reset all, Cancel, and Apply.
Settings → Keyboard shortcuts…: for each command you see the current key, Change, and Reset.

Interface language

In the same Preferences window you will find the Language menu. You can choose:

OptionEffect
SystemUse the computer’s language (if it is not one of the supported languages, the interface is in English)
ItalianoInterface in Italian
EnglishInterface in English
FrançaisInterface in French
EspañolInterface in Spanish

The language you choose applies the next time the program starts: after you confirm, close Stone Mate and open it again. Menus, messages, and dialogs will use the language you set.

The other preferences (characters, spacing, bar) stay saved and apply immediately, or in later sessions, as usual.

The Settings window with Language set to English ("Applies the next time you start the application."), Character size 12, Spacing between formulas 4, and the checked boxes of the first bar, for the topics (Base, Greek, Log, Trig, Analysis, Symbols, Logic, Matrices) and for the modes (Text, Graph, Draw, Signs, OCR); Cancel and Apply at the bottom.
Settings → Preferences…: language (from the next start), character size, space between rows, and the buttons on the first bar.
Chapter 13

Useful keys (a reminder)

These are the defaults. If you changed them in Settings → Keyboard shortcuts…, use the new ones (or open Help → Quick commands… again).

Document

ActionKey
NewCtrl+N
OpenCtrl+O
SaveCtrl+S
Save asCtrl+Shift+S
PrintCtrl+P
UndoCtrl+Z
RedoCtrl+Y
Copy / PasteCtrl+C / Ctrl+V
Duplicate rowCtrl+D
Delete lineCtrl+Shift+Delete
Move lineAlt+↑ / Alt+↓

Formulas and text

ActionKey
Fraction / power / subscript/   ^   _
Square rootCtrl+R
Strike-throughCtrl+Shift+X
Multiplication ·*
“Most used” symbolsCtrl+1 … Ctrl+9
Bold / italic / underlineCtrl+B / Ctrl+I / Ctrl+U

Draw and Signs

ActionKey / gesture
Undo / redo on the drawingCtrl+Z / Ctrl+Y (while Draw is active; also the icons above the plane)
Undo last drawing gestureEsc (while Draw is active; if there is nothing to undo, leaves the mode)
Delete the selected curve or columnDelete (with the Draw or Signs panel open)
Confirm a Value / segment / column labelApply, or Enter in the box

For the full list (with the keys you are using now): Help → Quick commands…. To change them: Settings → Keyboard shortcuts….

Chapter 14

If something goes wrong

ProblemWhat to try
I cannot remember how to make a fractionType the numerator, then /, then the denominator — or use the a/b button on Base
I cannot see a tab (for example Matrices)Settings → Preferences and turn that item back on in the bar
A shortcut no longer does what it used toSettings → Keyboard shortcuts…: check whether you reassigned it, or use Reset / Reset all
I want to change Ctrl+R (or another Ctrl/Alt shortcut)Settings → Keyboard shortcuts… → Change, then press the new combination
I changed the language and nothing happenedClose Stone Mate and open it again: the language applies at the next start
GeoGebra does not open in the browserOpen https://www.geogebra.org/graphing yourself, export a PNG, then Import PNG/.ggb
I cannot place ●/○ on the sign chartClick the row×column crossings, not the axis. On the axis you only move the columns
Delete removes the formula instead of the curveSelect the curve first (click the shape), then Delete or Delete curve
With Line I cannot join two endpointsUse a short click on the points; while waiting for the second endpoint, do not switch to Select. To move a finished line: long click on the segment
Ctrl+Z undoes the formula instead of the drawingWith Draw active, Ctrl+Z / Esc act on the drawing
Recognition from a photo does not startCheck the message at the bottom; the OCR helper may be missing, or the download may need your permission. You can always write the formula by hand
Print does not openCheck that the computer has a program that can open PDFs
I made a mistakeCtrl+Z undoes it (on the drawing if Draw is active); changes are not final until you save

In short

  1. Write on the page (formulas and text).
  2. Add graphs, drawings, or sign charts if you need them.
  3. Save the .smate file.
  4. Export or print when you have to hand it in.

Good work with Stone Mate.