Notebook Basics

Cell types

• Code cells evaluate Julia. The last expression's value renders below, along with stdout and any rich display (images, ECharts, tables, LaTeX).

• Markdown cells render GitHub-flavored markdown with LaTeX math and double-brace interpolation of Julia values.

Toggle a cell's type with the header button (M↓ / {·}) or press m / y in command mode.

A code cell shows an always-on editor with tree-based Julia highlighting (CodeMirror 6 + the Lezer Julia grammar), the run button, timing, and state badge:

Command mode vs. edit mode

KaimonSlate uses a Jupyter-style two-mode model:

• Command mode — the cell has an accent ring and single keys act on it.

• Edit mode — focus is inside the editor (green ring); Esc returns to command mode.

Key	Action
↑/k, ↓/j	move selection
⇧↑ / ⇧↓	move the cell up/down
⏎	enter edit mode
a / b	add cell above / below
m / y	to markdown / to code
dd	delete cell
⇧M	merge with the cell below

In edit mode:

Key	Action
⇧⏎	run (or commit a markdown/bind cell)
⌘⇧⏎ / Ctrl⇧⏎	run and open a fresh cell below
⌘⇧- / Ctrl⇧-	split the cell at the cursor
⇥	completion (Julia REPL completions + cell-local bindings)

Notebook-wide: ⌘Z / ⌘⇧Z undo/redo structural changes, ⌘K the command palette, ⌘⇧K the docs search palette.

Running cells

Run a single cell with ⇧⏎, or ▶ Run stale in the top bar to recompute every stale cell. The kernel dot in the top bar breathes while a computation is in flight.

Quiet cells

A code cell whose last non-comment line ends in ; suppresses display of the value (stdout and explicit display() still show) — handy for setup cells.

big = rand(1000, 1000);   # no 1000×1000 dump

Markdown interpolation

Inside a markdown cell, a double-brace expr block splices a Julia value into the rendered output:

Mean: {{ round(mean(data); digits=2) }}

{{ echart(spec) }}          <!-- an interactive chart -->
{{ slate_table(df) }}       <!-- an interactive table -->

Scalars render inline; images, charts, and tables render as blocks. Interpolation works inside math ($…$) too.

Completion

Tab-completion uses Julia's REPL completions against the live kernel plus the cell's own local bindings (assignments, loop/comprehension variables, function parameters) so names complete even before the cell has run. The popup carries a docstring preview, and method completions insert tab-through argument placeholders. LaTeX/emoji shortcuts work — type \pi⇥ → π.

Renaming cells

Cell ids are header-safe labels. Double-click a cell's id to rename it; renames are tracked as renames in history, and dependencies (which are by id) are rebuilt.