The shortcuts are the standard Microsoft dialog shortcuts as documented in the Dialog Box keyboard shortcuts section at the following link:
We don't document them specifically because these are Microsoft standards for all applications.
When the expand/collapse arrow of the group box has focus,the shortcut for expanding/collapsing the group box is the spacebar.
I hope this helps,
Thank-you, the spacebar works to expand the group boxes (to toggle between open/Closed). It also works to toggle a Checkbox (on or off) or between bullet Point selections.
In the What's New Dokument it might have been nice if it had been mentioned where this comes from. So we don't need to guess.
However, not all Microsoft keys are relevant, some keys may not have a function in SOLDWORKS.