[ramses0]

For me, this would be perfect a perfect use for removing tablature from some guitar sheet music:

https://s3.amazonaws.com/halleonard-pagepreviews/HL_DDS_0000...

...basically be able to slice the above image into various rows, and delete the "numbers" part, but keep + rearrange the "music" part.

Seems like the ability to paste / rotate an image and then add in a "razer-slicer" set perpendicular to page or matching the image rotation: https://www.youtube.com/watch?v=H6SuHTHoRd0&t=1m25s

It's a relatively common operation (even for text, maybe even especially for lined text) giving you the option to write single-space (or double-space) and then magically have extra room to take notes, edit, etc, then later remove those edits.

Actually it'd be very similar to "folding" handwritten documents (in the code-folding sense).