Annoying dimensioning behavior in draft

[Spaceballster]

Hi,
There's this thing in SE (draft mode, ST4) where it'll automatically select the line you're hovering over with your mouse when dimensioning. I like keyboard shortcuts/spacemouse buttons so I'm often hovering over a line when activating a dimensioning command. As a consequence when I want to dimension something it will have already selected the line I've been hovering over and I always need to cancel and reenter the command in order to get to what I want to dimension. Is there any way to turn this off? It's sooo %$# annoying...

 

[beachcomber]

Move you mouse and the highlight will go away until you hover over something else.
It is only selected if you click or use the keyboard shorcut command.
Cancel a selection/command with ESC.

bc.
Core i5-3570 @3.4GHz , 8GB RAM
Quadro FX4600. W7 Pro 64-bit.

 

[Spaceballster]

Thanks. But that doesn't help. If I consciously make sure my mouse is hovering over nothing and I activate "distance between" I will then move my mouse towards the thing I'm going to dimension. On its way my mouse will unavoidably touch a line or a point somewhere and SE will assume that's where I want to measure from and thus select it for me. There seems to be a time delay. If I wait a little before moving my mouse it will not automatically select a line I'm hovering over. So if I try to make it work for me I have to be robotically quick and if I work at my normal pace it will always select stuff I don't wanna select.