Just to point out clearly again, to reduce non-intuitive misunderstandings: Which buttons exist, or are hidden, or don't exist at all, what they do at left-click, what they do at right-click, which toolbar names are there: Except for a few macro-created buttons this mostly all
depends on the toolbars.cfg in the current skin folder, and on the look and size of the images in it.
BUT that doesn't mean you couldn't use a special skin if it's missing a special button or toolbar that's important to you. A user can always just copy over some button-creating text lines from one toolbars.cfg into another, make sure the needed images exist in either this skin folder or in the folder skins/default (create it yourself), and thus create the button himself. Or create completely new ones.
And what I personally love most: the back.bmp (toolbar background) image can be replaced by every image or photo a user likes better