Rectangular selections with the option key already exist, they select on-curve nodes rather than handles. I had a separate select tool once for selecting anchors. Maybe I can still dig it up.
You know, you can move from one to the next anchor by pressing the tab key?
Oh yes, I didn’t remember that function when I wrote the post, maybe with cmd? haha.
I know about the tab switching but still not the same, thanks anyway.
This plugin might do a lot of work. Thanks for sharing.
Suggested feature might speed up fine tuning process while editing complex shapes.
Example is attached.
Ah, you want to only select handles (off-curve nodes). Anchors are a different thing and why there was some confusion.
One way to do what you want, right now:
Click-Drag to select some nodes, as you do at the beginning of your animated gif.
Press and hold Shift & Option keys to click-drag another box around the nodes you want to deselect.
The Shift-drag is indicating to add to the current selection.
The Option key indicates to only select on-curve nodes. For on-curve nodes already in the selection, those will be deselected.