Is it possible to add/remove selected controls from existing Selection Sets? So if I make a set, but forgot to add something do I need to make a new set? same with removing controls.

Thanks

https://www.sidefx.com/docs/houdini/character/kinefx/selectionsets.html#creating-and-modifying-sets [www.sidefx.com] says to do:

1. Select the controls you want to add or remove.

2. RMB click the set you want to add or remove the controls from, and choose Add Selected to Set or Remove Selected from Set.