How to disable mouse block selection in IntelliJ?

Question

For some reason, dragging the mouse cursor began with selecting a block instead of the usual line selection mode:

(Please ignore the fact that this is an image from Visual Studio, not IntelliJ)

I tried to press the scroll button by pressing and releasing the alt / ctrl / shift keys, but the selection does not return to the normal "select full lines" mode. When I click and hold, then drag the mouse, I get a block selection (rectangle).

Do you know how to undo this?

PS I am running IntelliJ 9 on Ubuntu.

PS Holding SHIFT and pressing the up arrow button also makes a block selection instead of the usual multi-line selection.

Answer 1

Use Alt + Shift + Insert to switch between Column and Insert modes.

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Copying the comment from brent.payne below:

If you are running ubuntu running on mac boot pro, then the key stroke is Alt + Shift + Fn + Enter . Fn + Enter = Ins since in the macbook pro file

no key ins

Answer 2

Modify> Column Selection Mode

Answer 3

First you do

"Edit" > "Column Selection Mode" 

THEN you go to

 Settings -> Keymap 

and find Column Selection Mode , then right-click on it and remove the key bindings so that it doesn't turn on again.