Select multiple rows simultaneousely
Allow to select multiple rows. Then perform some operations on them, like moving or just formatting change.
This will be a marvelous innovation, and for me crucial. I'm using UV Outliner for fiction writing, so the multitude of spreadsheet-type options most outliners emphasize are of little consequence. On the other hand, being able to move whole blocks of text, whole scenes and even chapters, without having to move them each one at a time, will be a dream come true.