Fit to Selection zooms to each Shape you review

Reviewing small Shapes used to mean zooming in on one, zooming out to find the next, and zooming in again.

In Labelme v7.9.0, Fit to Selection is a zoom mode next to Fit to Window. It is in the View menu and is a button beside the toolbar's zoom field. While it is on, the view zooms to the selected Shapes, with a margin around them, whenever the selection changes. Click a Shape, or step through the Shape List with the arrow keys, and each one fills the view.

The shortcut#

Press Ctrl+Shift+F (⇧⌘F on macOS) to turn it on. The shortcut used to belong to Fit to Width, which v7.9.0 removed. Turned on with nothing selected, Fit to Selection shows the whole Image, as Fit to Window does, so pressing it out of habit does no harm. Clearing the selection later keeps the current view.

Zooming by hand switches to manual zoom, as it does from the other fit modes. The toolbar's checked button shows which fit mode is on. The implementation describes how the view centers the selection.