Before choosing a theme, you can preview how it will change the look of the Identity Manager user interface.
Go to the Themes page:
Find a theme that you are interested in, then click the corresponding Theme Preview link.
The preview for that theme displays in a new browser window:
Scroll through the preview to see the characteristics of this theme.
When you’re done, click Close Preview Page (in the top-left corner) or close the preview window manually.