Double the viewport
Half the viewport
Scale the viewport of one or more graphical windows by a factor. A factor
greater than 1 scales up, a scale factor less than one scales down.
If the command is started from the graphical window's menu, the context menu
or by a mouse stroke then the destination window is implicitly assumed.
In all other cases the destination window must be explicitly defined if the
window layout contains more than one window.
The destination window is identified by a digitized point or by typing its
identifier. Since the identifiers are powers of two (e.g. 1, 2, 4, ...) a
set of destination windows can be defined by adding the identifiers of all
windows of the set (e.g. 1 + 2 + 4 for windows 1, 2 and 4). A destination
set containing all windows is indicated by the identifier -1.
For dynamic scaling, a
special command is