Haiku uses a layout manager to position the elements of the GUI, like text fields, buttons, boxes, pop-up menus etc. Still, one has control over the spacing between those elements. Sometimes this spacing is too large or small. For example, see the Mouse preferences, where the spacing above the line "Focus mode:" is bigger than below.

For this task you'll have to go through all Haiku's applications, preference panels etc. and look for these anomalies.

Keep a list of all the programs you've tested (don't forget possible settings windows etc.). Report problems together with screenshots in our bug tracker.