The standalone MadCap Help Viewer interface consists of two major sections:
In addition, other features may open in window panes on the far right or at the bottom of the interface.
As mentioned, the two main areas of the standalone Help Viewer interface are the default locations for these elements. However, you have the flexibility in the Help Viewer to close or move elements around as you like, so it is not mandatory that every window remain permanently in its default location.
In addition to the main areas mentioned, the Help Viewer's interface also consists of menus and global toolbars.