If you are have DB Admin permissions set in your User Profile, it is possible to specify the maximum length of inactivity before PICSWeb automatically logs out. The time you specify will apply to all PICS users.
To configure session timeouts, go to the User List and select Actions > Idle Time Out Setting from the top-right corner.
This will open a window where you can enter the maximum length of inactivity in minutes. Select Save to apply the new time limit.