Tip: Export to audio file only the selected fragment

Currently you can export all parts, individual parts. But if you want to export only a minimal fragment that you have selected, you cannot or you have to export it to another file and from there... It is very tedious.
It would be interesting to add "Selected Only" to individual parts or all parts. So, that musical phrase that we think is excellent or that exemplifies what we want to say, we don't have to look for publishers to eliminate all the rest that doesn't interest us.
1. Select the measures, notes, fragment, instruments, etc.
2. File -> Export
3. Select All parts o the instrument.
4. Active the new checkbox Option: Export only selected.
5. The result is the parts/instrument playing the selección only.

This is fast and simple for the user.