Log graph: preview commits pointed by arrows in Log window

When history is complicated and there a lot of branch paths drawn in the Log window, some paths are split with arrows. It allows to save space, but when you click on such an arrow, you have no idea where you have landed. Besides, if several arrows are pointing from a particular commit, and you are interested only in a particular one, you have to click on all of them in order to find out the necessary one. And BTW there is no easy way to "go back" in the Log window. It would be nice to see some preview information about a commit I am about to go to, when hovering an arrow. And it would be nice to have an ability to "go back".