What computer operating system is involved?
a. You are referring to the Expert workspace and Quick workspace interface brightness and contrast
b. You are referring to how to adjust the brightness in a video clip that has been imported into a Premiere Elements 13 project?
The workspace interface brightness is what it is. The fx Effects have several opportunities for adjusting the brightness and other features of a video clip.
Please review and consider, and then, based on the details of your reply, I can fine tune the information that you seek.