Missing documentation for Edit layer properties
The Edit layer properties..
dialog, accessible only through the Layer right click context menu, is not documented in our manual. On a side note, maybe we should have this also available in the main Layer menu.
In https://docs.gimp.org/2.10/en/gimp-layer-menu.html an old version of the Layer context menu is shown, but the above-mentioned item and its related submenus about Blend Space, Composite Space, Composite Mode, Color Tag do not appear in the documentation for the menus.
They are documented in the New Layer dialog, which for a large part is the same as the Edit layer properties
dialog, but not everyone looking for this information will remember to look there.