I'm trying to expand a repeat ending (ending 1) that is currently 1 measure to four measures, but if I try to insert measures they always get inserted outside of the repeat symbols.
A screenshot of the current situation:
The easiest solution seems to be to use the repeat tool to remove the endings, then to add the measure, then to use the repeat tool to add the endings as you want them.
These are the steps (using the repeat tool):
Now you should have the repeats as you want them.