A **context** is a named group of pins within one scene. Learners can
switch contexts to filter what they see — "Safety", "Service",
"Equipment".

## Contexts belong to a scene

Each scene has its own set. A kitchen scene can be organised by hazard
type while the dining room scene is organised by service stage; they
do not have to agree. Every scene starts with one default context, so
you only think about this when you need to.

> A context is a group of pins on one scene. Learners use it to show one group at a time — so contexts are how you say "now look at the wiring, not the plumbing".

## Making one while you are placing a pin

You do not have to leave what you are doing. The popover that opens when you
drop a new pin can create a context there and then, and the pin lands in it —
so realising half-way through a scene that these five pins are really a
group of their own costs you nothing.

## Hidden contexts

A context can be marked **author-only**. Its pins are visible to you
in the editor and invisible to learners — and they are *excluded when
the experience is published*, not merely hidden afterwards. Nothing in
a hidden context is reachable by a learner who knows where to look,
which is what makes them safe for staging notes, answer keys and
work-in-progress.

Pin numbering closes the gap: if pins 3 and 4 are hidden, learners see
an unbroken 1, 2, 3.

## Deleting a context

Deleting a context asks what to do with its pins — move them to
another context, or delete them with it. It will not silently orphan
them.

## Contexts and activities

**Sort into contexts** hands learners your pins and asks them to file
each one correctly. If you plan to use it, make the contexts
genuinely distinguishable — a sorting task where two categories
overlap is a test of guessing.