Source: https://mokxi.com/docs/editor/blocks
Updated: 2026-09-27

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Docs / The editor / Reusable blocks

# Reusable blocks

A bit of circuit you built once, kept by name and dropped in again whenever you
need it: a voltage divider, a debounced button, the parts for
your display.

## Saving one

Select the parts you want (drag a marquee, or shift-click them one at a time)
and choose Save as block… from the canvas toolbar's more menu. Name it and
it is on the shelf.

What a block keeps is exactly what Copy would take: every selected part with
its properties, its rotation and its program, and every wire whose two ends
are on selected parts. A wire with one end outside the selection has nothing to
attach to in the copy, so it is left out. Breadboard holes count as pins of the
breadboard, so a board with parts pushed into it needs the board selected too.

A block never carries a lock. The lock is a teacher holding a starter circuit in
place; a block is your own copy, and copying a locked part is how you get one you
may move.

## Dropping one in

Open the part panel with + or A. Saved blocks are listed under a
Blocks heading near the top, each with a drawing of the real circuit on the
tile. It uses the same drawing code the part tiles and the site's own bench tiles use,
so a block looks like everything else in the panel.

Click a tile and the block lands in the middle of the view. Drag it and it lands
where you let go, with its top left corner at the pointer and everything snapped
to the grid. Either way the parts arrive with fresh ids, their internal wires
remapped to them, and the whole drop is one undo step. What was dropped is
left selected, so it can be moved or rotated immediately.

Typing in the search field narrows the blocks by name as well as the parts.

## Renaming and deleting

Hover a block's tile (or focus it with the keyboard) and two small buttons
appear at its top right: ✎ renames it and × takes it off the shelf. On a
touch screen both are simply there.

## Where they live

Signed in, on your account: the shelf follows you to another machine or
another browser, the same way your projects do. Signed out, a block lives on
this browser only, in its own storage under one key for the whole editor
rather than one per project.

Either way, a block is not in the document. It never travels in a save, an
export, a share link or a room, and two people in one live room each have
their own shelf.

The first time you sign in with blocks already sitting on a browser, the
Blocks section offers to move them to your account: Move copies them
over and keeps the ones that do not fit if your plan is full, Not now
puts the offer away for that account for good. Nothing moves on its own.

The free plan keeps fifty blocks on an account; Pro and the student price keep
five hundred. Signed out, a browser keeps up to sixty, newest first, and
clearing this site's data clears that shelf.

### On this page

Saving one Dropping one in Renaming and deleting Where they live