I can't seem to figure out how to use custom colors properly. When I "add to custom colors" this usually overwrites the first color slot. If I click another slot, this overrides my currently selected color. I don't want to type the color in manually because I'm frequently obtaining the color by clicking on an existing note and viewing its color. I then want to add THAT color to the custom color list. No doubt I'm just missing something obvious.

On a slightly-related topic, can I change a note from solid to hollow and vice-versa? This doesn't seem to be exposed in the inspector. I frequently create diagrams by copying and modifying existing ones, and often this means changing visual attributes like color, outline, solid/hollow, etc.

Thanks if you can clarify.