[john.gersh]

But wait, there's more...

There's an exception to the first rule and third rules: Hovering over a layer shows the icons for its settings. Clicking on one of those changes the setting without selecting the layer. Also, I was wrong about double-clicking.


Perhaps a better click-action logic is:

There are five regions in a layer in the Canvases panel: lower right, left, the layer rectangle icon, the layer name, anywhere else.

The selected layers are indicated by blue highlighting. Selection makes a layer the target of applicable menu actions. (As it does everywhere in a Mac OS.)

Single-clicking:

The lower right region contains settings icons which appear on hover. If a setting is in a non-default state, its icon appears all the time. Clicking on one toggles its setting. The click does not change the layer selection.

The left-hand region contains drawing-status icons. Clicking there makes a previously-inactive layer active. It also selects the layer.

Clicking in the remaining area selects the layer without changing anything else.

Double-clicking:

Double-clicking on the layer's rectangle icon does the same thing as single-clicking in the left-hand drawing-status region: it makes the layer active and selects it.

Double-clicking on the layer name makes the name editable.

Double-clicking on a settings icon toggles its setting (once) and selects the layer.


Whew!