Hover your cursor over a task arrow in order to edit its color or font.
When editing a task or milestone you also have the ability to display the bar as a dashed frame without filling, you can completely delete, move it, as well as change its size. In addition, you can move an item by clicking on the Date button and entering a desired time period.
Finally, you have the option to change the shape and color of the symbol used to represent the milestone. The labelling of this milestone can be moved with the help of snapping points. To do so, simply click on the milestone to make a snapping point appear. Select it and move it to the desired location while holding the mouse button.