Move arrow tip of annotative leaders

Hello,

Is there a way to move the tip of the other scale's arrow of an annotative multileader in the model space ?

For exemple, I shifted this tree a little bit to the left. I have a multileader pointing to the middle of it to indicate the tree species. When selecting the multileader, I can use the little blue square to move the tip of the small arrow but how can I move the other one ? 

Since that multileader is pointing to other trees as well, I cannot move the whole thing.

I guess I could go to the paper space and into a viewport using that scale, but I need to do that quite often and I'm sure there should be an easier way.

Thanks.