# What readers see

> Hover previews, the floating window, and the dock a stratum opens into.

Strata stay out of the way until a reader wants them.

![blueprint:josh/reading-a-blueprint](https://blueprintr.io/embed/josh/reading-a-blueprint?exclude=cmtpw7gm9000tlduy9serbxzs&hideTabBar=1#h=640)

## Marked shapes

A shape carrying a stratum is marked on the canvas. The mark is the only change
to the drawing, and a reader who never clicks one still sees the complete
diagram.

## Hover

Hovering a marked shape for half a second shows a preview card with the
stratum's name and its opening lines. Enough to decide whether to click.

## The window

Clicking opens the stratum in a floating window. Readers can move it, resize it
from any corner, maximise it, or minimise it to a strip.

## The dock

The window can be docked to a panel down the right-hand side, half the viewport
wide by default and draggable from there. The page reflows around it rather
than being covered.

Dock the panel to work through a diagram shape by shape while the drawing stays
put.

> [!TIP]
> The dock only appears on a blueprint's own page. In an
> [embed](/foliums/blueprintr-user-guide/sharing/embedding-blueprints) there is no page to
> reflow, so strata open as floating windows inside the embed's frame.