Photo-Paint 8 does not display the History list icon in the standard
Toolbar; you must add it in. As I sometimes use another person's
computer and am conscious of the fact that they may have taken great
care to set their system up just the way they want it, I will firstly
create a new Photo-Paint Workspace Profile to which I will
then apply Toolbar changes.
Oddly, in order to add icons to a Toolbar, an image must first be opened. Thus, after starting the program, click New Image and create a small (e.g. 100x100 pixel RGB) image. Try making changes to the Customise option (Step 2) without first having an image open and you will see what I mean.