The primary window cannot have any text or graphics, only automatic links to each of its secondary windows. Each automatic link to a secondary window requires the auto and split attributes. The following is an example of the tagging for a primary window that contains a split window:

:h1 res=001 scroll=none.Primary Window A
:link reftype=hd res=002 auto split group=10
      vpx=left vpy=top vpcx=50% vpcy=100%
      scroll=none titlebar=none.
:link reftype=hd res=003 auto split group=11
      vpx=right vpy=top vpcx=50% vpcy=100%
      scroll=vertical titlebar=none.

The primary window does not have text and does not need a scroll bar; thus, the heading tag attribute is scroll=none. The primary window can define an overall title bar and disable the title bars in the secondary windows.

Caution:

When defining split windows, do not link to a footnote from a secondary window.

For example, the text of a secondary window cannot have a link such as the following:

:link reftype=fn
      refid=001.
Display Pop-Up Window
:elink.