You enter a particular plot mode by producing a plot of the corresponding type. For example, if you produce an undeformed plot, the current viewport will then be in the undeformed plot mode. The plot mode of a viewport persists until you produce a plot in some other mode in that viewport. If you create multiple viewports, each viewport can be in a different plot mode.

The plot mode of the current viewport is identified on the left side of the prompt area, as shown in the following figure: