Whaaat?!
How am I only now finding out about it? Well, that’s a well hidden feature…
Untrim has an icon, the others are derivates. I would say the UntrimBorder command is practically the same as what Untrim does by default.
Note that I only uploaded that single screenshot as a quick example in reply to the OP. The amount of commands that are not accessible through the menu or the toolbars is a lot greater.
Other, a lot more important features and commands, are deeply hidden and nearly impossible to find by most Rhino users. Take the “crv” and “srf” hidden command line options, for example. Probably 99% of the Rhino users are not aware of their existence, even though they are extremely important when it comes to trimming and splitting (especially if different types of objects and sub-objects must be combined in a row to complete the trimming process).
