To make changes to the properties of a frame or frameset, begin by selecting the frame or frameset you want to change. You can select a frame or frameset either in the Document window or by using the Frames panel.
The Frames panel provides a visual representation of the frames within a frameset. It shows the hierarchy of the frameset structure in a way that may not be apparent in the Document window. In the Frames panel, a very thick border surrounds each frameset; each frame is surrounded by a thin gray line and is identified by a frame name.
In the Document window’s Design view, when a frame is selected, its borders are outlined with a dotted line; when a frameset is selected, all the borders of the frames within the frameset are outlined with a light dotted line.
To select a frame, click the frame. (A selection outline appears around the frame in both the Frames panel and the Document window’s Design view.)
To select a frameset, click the border that surrounds the frameset.