Stopping mouse selection in Visual Studio

Question

I don't know what key combination I did, but now each time I click somewhere in the page, Visual Studio selects the text between first and second mouse click.

I tried to escape from this "selection mode", but nothing helps, nor Escape, nor left clicks, nor Ctrl+Up/Down. I opened another VS window and there is all right - normal selection.

What is it, how to cancel it, what is it for?

I should probably restart Visual Studio. I remember that that happened some times ago in VS 2005. Very annoying VS "feature".

P.S. It disappeared as suddenly as it appeared, but I found similar problem described here. The guy says that "The only way to stop is to press escape or shift and an arrow key."

Answer 1

I have very often the same issue, just after stopping the debugger. No idea how it starts... But I found the key combination to stop it: Press "Alt Gr"+"Ctrl(right)"+"Shift(right)"

Answer 2

I figured out how to turn this issue on and off: Just press the ins (Insert) key; If you're using a full sized keyboard it will be to the right of backspace and above delete or if you're using a smaller keyboard it'll be the second option of zero key on the number pad to the right of the right arrow key.