Good Afternoon Komgrit.
This is a kind of general statement, reading:
The USS-UI is difficult to customize, because almost all of it, is 'hardcoded' in the widgets as installed.
Sometimes it is possible to change something on 'colors' e.g. through .css file(s).
In other words, customizations allowed on USS are very limited.
You cannot customize USS on the similar level of SC or SDM.
The only things you can do are changing logos, company name, etc.
Please check the below page for this:
https://docops.ca.com/ca-service-management/14-1/en/administering/configuring-unified-self-service/modify-unified-self-service
Thanks in advance for your understanding and kind regards, Louis van Amelsfort.
PS. Folder to check is C:\Program Files\CA\Service Catalog\view\webapps\usm\explorer\scripts\widgets