It is difficult to edit several styles at once in the Edit Highlight Styles dialog. When I make some changes to one style and then click on another item, I expect it to retain the changes that I just made, but it is losing them.
Go into Edit Highlight Styles and change the name, color, intensity, shape, or pattern of the first item. Then click on the second item in the list. Now select the first item again. The changes that you made are lost. The only way around this is to click Up/Down to commit the changes before editing another one.
Accordance 10.4.1 Mac