The screen

The window has five parts.

+-------------------------------------------------------------+
| (suite bar, wide browser windows only)                      |
| File  New Open Save Undo Redo                               |
| Math | Input/Output | Functions | ... | Resources           |   ribbon
|  [groups of buttons for the selected tab]                   |
+----------------------------+-----------------------+--------+
| tab: Beam check            |  Results              |Sidebar |
|                            |  Preview Unwrapped    | Insert |
|  editor                    |  Input Report         |  ...   |
|                            |                       |        |
+----------------------------+-----------------------+--------+

The ribbon

A quick-access strip at the top holds New, Open, Save, Undo and Redo. Under it are ten tabs. In a sheet the buttons insert the sheet form of each item, and a button that has no sheet form inserts Calcpad text as >> lines and carries a small >> mark.

Tab	What is on it
Math	Regions (math line, text, heading, image, plot, table), operators, Greek letters and symbols, programming (conditions, loops, macros), constants, numerical methods, units, clipboard.
Input/Output	Input fields: entry, slider, dropdown, radio, checkbox (the `?` form in a sheet, `#UI` in a worksheet), data grid; reading and writing files; breakpoints; the Input form view.
Functions	Trigonometric, hyperbolic, logarithmic, rounding, statistical, logical, complex and other functions; define a function; the Symbolic dialog.
Matrices/Tables	Vector and matrix literals, vector and matrix functions, determinant, inverse and transpose, tables.
Calculation	Calculate, auto-calculate, the four result views, settings, and the Variables and Errors lists.
Plots & Diagrams	Function, parametric, multiple and colour-map plots; plot settings; the Figures group: the Diagrams menu of starter diagrams (see Diagrams) and Image.
Math Formatting	Rounding, number format, angle units, output control (`#hide`, `#val`, `#nosub` and so on).
Text Formatting	Headings, bold, italic, colours, links, lists, rules, page break. In a sheet these write Markdown.
Document	Import worksheet, the tidy tools, header and footer, page break, the report, contents, metadata, and Save as, Print PDF, Word, Excel and Export.
Resources	Samples, library, New sheet, New Calcpad, Show compiled, Convert to Calcpad, themes, zoom, the sidebar and Settings, help.

The tabs follow the work: write (Math to Matrices/Tables), calculate, plot, format, then the document. Hover over a button for what it inserts or does; where it teaches syntax the tooltip shows the typed form.

The editor

The editor is on the left, one tab per open file. It colours the text, completes names, Greek spellings and function names, and underlines mistakes. Hover over a name to see where it is defined; F12 jumps to the definition. Format Document (Shift+Alt+F) tidies a sheet. See Editing.

The results

The right-hand pane shows the calculated worksheet. The Calculation tab chooses between four views:

Preview: the document as written, with every #pre and #post part. This is the usual view while you work.
Unwrapped: the source listing with macros and includes resolved. Useful for finding errors in macros.
Input: the fill-in form of a sheet or worksheet that has inputs (L: ? 6 m in a sheet, #UI in a worksheet). See Templates with inputs.
Report: the print layout, as it will come out in a PDF or Word file.

Results update as you type; Auto-calculate can be turned off on the Calculation tab, and then Calculate (Ctrl+Alt+X, and F5 in the desktop app) runs the sheet on demand.

Under a plot there is a row of small buttons (log axes, 1:1, copy data, save as PNG or SVG). These are in the preview only and are not part of a printout or export.

The sidebar holds the Insert tab, a searchable library of every symbol, function, unit and snippet (a click inserts it at the cursor), and tabs for the table of Contents and the Variables of the worksheet. Settings, Export, Errors and Prettify open as dialogs over the page. Hide the sidebar with the button at its top right, or Resources > Sidebar (Ctrl+Shift+B in the desktop app).

Settings

The gear at the right end of the top strip opens Settings (so do Calculation > Calculation settings and Resources > Settings). It has five tabs:

Tab	What is on it
General	Language, number format, and the appearance (colour theme, preview theme).
Calculation	Decimals, angle units, complex numbers and the other math settings, plot defaults, US or UK units.
Editor	Quick typing, comment format, formatting keys, auto-run, cursor sync, the linter.
Export	The PDF page: paper size (A4 or Letter by the browser’s region until you choose one), orientation, margins, header and footer.
Advanced	Script libraries, logging and limits, the server address, saved configurations.

The search box above the tabs looks through all of them and lists each match under its tab’s name; clear it to get the tabs back. Settings opens on the tab you last used, until the browser tab is closed. Calculation settings opens it on Calculation, and Document > Header and footer on Export. On the tab strip, the arrow keys, Home and End move between the tabs.

On a phone

At 760 pixels wide or less, one pane shows at a time, switched from a bar along the bottom: Edit, Results and Insert. The ribbon starts folded; tap an open tab to fold it. See Editing for touch editing.

Keyboard shortcuts