As I shared with Johannes previously
In Zim, ALT + Up/Down is doing the same as ALT + Left/Right. Right?
So I think ALT + Up/Down would be my favourite.
But there is other possibilities being used:
Atom: CTRL + Up/Down
Notepad++: CTRL + Shift + Up/Down
Sublime: CTRL + Shift + Up/Down
Visual studio: ALT + Up/Down
Eclipse: ALT+ Up/Down
Gedit: ALT + Up/Down (and ALT + Left/Right to move words in
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