displayMode

Get/set page display mode.
[read/write property] displayMode([out, retval] int *mode) displayMode([in] int mode)
XpdfViewer has five page view modes:

All of the mode values are read-only properties, so they must be accessed as viewer.displaySingle, etc.

Set the displayMode property to change the page display mode. Read the property to get the current mode.

VB6:
viewer.displayMode = viewer.displayContinuous
displaySingle
displayContinuous
displaySideBySideSingle
displaySideBySideContinuous
displayHorizontalContinuous