The example of a source file shown in the following figure defines two windows. The origin and size attributes specified with the heading definitions place the windows adjacent to one another on the screen.

:h1.Origin and Size Window Example
:h2 res=003
    x=left y=bottom
    width=50% height=100%.
Primary Window
:p.
Here is the text for the primary window.  This is a
:link reftype=hd res=004.
hypertext link
:elink.
to the secondary window.
:h2 res=004
    x=right y=bottom
    width=50% height=100%.
Secondary Window
:p.
Here is the text for the secondary window.  This is a
:link reftype=hd res=003.
hypertext link
:elink.
to the primary window.

The origin of the first window is the lower left-hand corner of the coverpage window. It occupies 50% of the width, but 100% of the height of the coverpage window on the left-hand side.

The origin of the second window is the lower right-hand corner of the coverpage window. It occupies 50% of the width, but 100% of the height of the coverpage window on the right-hand side.

Although these two windows occupy adjacent positions on the screen, you cannot display them both at the same time. To define separate windows, you must specify a group number in the heading definition.