Explain the problem as you see it
I try, whenever possible, to use the keyboard and shortcuts as I believe they speed up the operation. Sometimes it takes me a while to realize where the cursor is located or, in other words, which node is currently selected.
Why is this a problem for you?
I think this is a usability issue that can be improved. The problem is finding myself "lost" at times, trying to find where the cursor is.
Suggest a solution
The proposed solution is to highlight the currently selected node with a background color. I believe that the ideal case is that this selection (highlight) can be turned off, that is, it could be a "user option" (setting). An extra bonus would be that the background color and transparency can also be chosen/customized.