On Log/History view, if you are working with too many branches, tracing what has been changed on which branch is sometimes quite mess even using the graph view.

If the graph view would provide a new feature that, when any branch/commit is clicked on the history list, that branch where the commit is done would be highlighted with a thicker line, that would be very useful. 

Graph view is useless if so many branches are created from one branch, because the lines get mixed up. See below picture as an example: