Is it possible to create a shortcut command to add / remove the leader from a tag...any tag. Right now I tag elements in the model and have to manually click the little check box to turn the tag leader on or off. This sucks. Does any one know which shortcut this leader applies to. I've tried a bunch in the shortcuts list but can't seam to find which one applies to turning on / off the tag leader. Thanks.
Doesn't appear to be possible (looking at Revit MEP 2013), as the "Leader" checkbox is directly tied to the "Leader Line" parameter under Properties. All of the leader-related commands in the Keyboard Shortcuts dialog apply to standard Text and Generic Annotation Elements.
I agree, if you're going back and forth between needing and not needing the leader, a keyboard shortcut would be nice. Until then, I tag all of the elements that require a leader and then uncheck the box before tagging the rest of the elements. That changes the leader's default state for new Tags.