The design of panels presenting the subtasks of a task (or search) with arrows and full blue title background was helping a lot. The all white background makes it not so legible now.

A specific color for the background of the headline of the Outline and Agenda panels (dark blue and red?) would also help a lot.

Note the following bug: the content of the headline of a box is cut at 18 characters even if 1/4 the width of the panel.