Source: https://mokxi.com/docs/start/the-screen
Updated: 2026-09-28

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Docs / Getting started / The screen, part by part

# The screen, part by part

The editor is a header, a canvas, a code pane and a serial monitor. This is what every control on it does.

## The header

Left to right, on a wide screen:

- The wordmark goes home. Once you are signed in it goes to your account and
your projects instead.

- Save, a split button. The wide half writes the project; the chevron opens
the rest: Save a copy, Save to my account, and a Built-in projects submenu with
the circuits that ship with Mokxi. The label under it says what state the
project is in, from Saved to Saving to unsaved changes.

- Run, which starts and stops the simulation. It turns into Stop while a
circuit is running.

- Share, which opens the share sheet: a link, the public or private switch,
the embed code, PNG and SVG export, and the live collaboration links.

- The heart, which marks a project as a favorite.

- The project title, with a pencil beside it to rename it.

- SPICE, a badge you can press. It says in five paragraphs what the engine
does and does not do, on the canvas and in a SPICE deck, which is the same
thing What Mokxi simulates says at length.

- The engine badge, which reads engine: loading until the wasm engine is
up, and then says which engine is running.

- The readout, which is two numbers: simulated seconds, and speed against
real time. 1.00x means the circuit is keeping up with the clock on the wall.

- The theme toggle, Docs, and your account.

On a phone the header keeps the wordmark, Save, Run and a menu button; the rest
of that row is inside the menu.

## The canvas

The left pane. The breadboard, the parts and the wires live here, on a dotted
ground. In its top-left corner is a small toolbar: Run, Undo, Redo, + to add
a part, and a more menu holding zoom, fit, rotate, delete, select all, the
layers panel and the grid switch. Every item in that menu names its keyboard
shortcut, and keyboard shortcuts lists them all.

Select a part or a wire and its properties open beside it: resistance, LED
color, wire color, a wire label, rotate and delete. See
the properties panel.

## The code pane

The right pane. It is one project per board: a file strip with tabs, a board
picker when the diagram has more than one board, and the editor itself. A
diagram with no board at all still has a sketch, so you can write code before
you decide what runs it. Building happens in the tab, and the Build tab shows
the steps and any diagnostics. See
the code editor and compiling.

## The serial monitor

The strip along the bottom. Anything a board writes to its UART appears there,
and the input line sends bytes back to it. When two boards are talking, each
line is prefixed with the board it came from. The log keeps the last two
thousand lines.

## Moving the walls

The bar between the canvas and the code pane, and the bar above the serial
monitor, are both draggable. Where you leave them is remembered in this browser,
so the next visit opens the same shape. Out of the box the canvas takes 58 per
cent of the width and the serial monitor is 180 pixels tall.

## The help button

Bottom right, on every page and in the editor: a speech bubble that opens search
over these articles and every question the site answers, and a message form that
reaches us if the answer is not here.

### On this page

The header The canvas The code pane The serial monitor Moving the walls The help button