Siebel Developer's Reference > Siebel Templates for Customer Applications > Page Containers >
Framed Versus Unframed
All applications ship with HTML frames enabled and with a set of nonframed templates that can be applied to the customer applications.
NOTE: Siebel employee applications require frames. The removal of frames can only be done in the customer applications, and the page container is where you would do it.
For information about running customer applications without frames, see Siebel eSales Administration Guide.