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Inside a cell, type and select text as usual. Press Esc to select the whole cell.

Enter

Edit the selected cell

↑ / ↓

Select previous / next cell

Shift ↑ / ↓

Extend or shrink the cell selection

⌘ / Ctrl A

Select all cells

⌘ / Ctrl C, X, V

Copy, cut, paste cells after the selection

A / B

Insert code above / below the selection

Delete / Backspace

Delete selected cells (undoable)

⌘ / Ctrl Enter

Run the current cell

Shift Enter

Run, then select the next cell

Alt Enter

Insert below, then run the current cell

⌘ / Ctrl Z

Undo (add Shift to redo)

⌘ / Ctrl S

Save to file

⇧ ⌘ / Ctrl S

Save as

?

Show this help in cell selection mode

While editing text

↑ / ↓

Move a line; cross to the adjacent cell at an edge

Page Up / Down

Move one editor page, preserving the column

Cmd ↑ / ↓

Jump to the first / last line; cross to the adjacent cell when already there

Home / Cmd ←

Move to indentation, then the start of the line

Ctrl Space

Complete a checked notebook name (with its type)

F2

Rename the binding under the cursor

Hover a name

Show its checked type

⌘ / Ctrl /

Comment/uncomment the current or selected lines

⌘ / Ctrl F

Find and replace in the active notebook

⇧ ⌘ / Ctrl F

Find and replace in the active notebook

⇧ ⌘ / Ctrl −

Split cell at cursor

Shift M

Merge selected cells (cell selection mode)

Alt / Option click

Add a cursor

⌘ / Ctrl Alt ↑ / ↓

Add a cursor above / below

⌘ / Ctrl D

Select the next occurrence

⌘ / Ctrl Shift L

Select all occurrences

Alt Shift drag

Select a rectangle

Multiple cursors edit within one cell. Shift extends text selections without leaving the cell. Vertical motion keeps its intended column across shorter lines and cells.

Use the triangle beside a cell to collapse or expand it, including Markdown. Arrow keys connect the App header and the first cell in both editing and cell-selection mode. Click a cell number to select it; Shift-click to select a range. Open ⋯ on any selected cell to move, collapse/expand, or merge the group. Click prose to edit Markdown. Tab moves between controls; it indents in an editor. Press Esc first to navigate controls.

Export as Roclet bundle (.roclet.zip)Static report (.html)Interactive site (.site.zip)

Include current result snapshots
Include debug messages from this run
Show code in the static report

Roclet bundles include the source, attachments, project files, cell structure, and compiler identity. Open them in a compatible version of Roclet. Reports open directly in a browser. Interactive sites include Roclet and the compiler for hosting on HTTPS or localhost. Existing saved-output comments stay part of the source. Nothing is uploaded.

Roc downloads are runnable scripts. Rich outputs use a pinned Display package, which Roc downloads automatically. Roclet supplies it offline.

Not prepared for offline use

This installs a verified copy of Roclet and its compiler. Bookmark this Roclet address, then reopen it to edit and run without a network connection. Updates take effect after all Roclet tabs are closed.

Browser drafts belong to this origin and profile. Keep downloaded copies of important notebooks.

Keep a copy of your data with this notebook. Files stay in your browser and are included in Roclet bundles.

Save a Roclet bundle to take your data with you. A .roc or .md source file contains only the notebook code and prose.

Add Roc modules and text files beside your notebook. Import a module with import Geometry. Download a Roclet bundle to include these files.

Add files…

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Path

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Download bundle ↗

Download the .tar.zst file, then load it below. Roclet verifies the package hash before using it and caches verified bundles in this browser. Additional dependencies may ask for their own bundle.

Choose a notebook for the right panel. Each panel has its own compiler worker, undo history and status.

Update this definition and its resolved references across the notebook.