"My initial thought is to just have Spacebar be the toggle for locking a newly aligned, constrained element within the Family Editor. It could be any shortcut, if there was an option within the keyboard shortcuts for it.
For example:
I align a line to a reference plane, the lock shows up, I hit spacebar. Done.
When you have a lot of constraints to add, it's a pain to lock everything with the mouse. If there was a keyboard shortcut option, that would be great!"
Some further discussion and clarification:
"The problem would be when there are multiple locks, such as when you draw a line - 2 or 3 locks show up. Which one would the space toggle?"
casquatch
"It would probably be all or nothing. Most of the time I get multiple toggles, I don't trust that they are locking where I want them anyway, so I'd rather just ignore those and go back to align/lock to the workplanes. That way I know for sure what I'm constraining to."