Hi Wim, a "commandset" is a group of commands, it's a button like this that pops out a sub-menu of related commands:





Then these are command buttons that run an individual command when you click on them:




> would it be possible to add scale 2D and 1D too? How do I do that then?

Well where do you want them to go? There isn't currently any empty space next to the "Scale" command set button.

- Michael