XRPS uses frames to subdivide the viewer window. This frames environment is invoked as soon as a PI has successfully entered his/her personal information and is registered as a user - and thus ready to enter more details on the planned observations, for which the ``Proposal details'' page is loaded. As illustrated in Fig. 6, there are in total four frames.
The top frame just displays which software application is used. The other frames are described briefly in the following subsections.