Specifies the display screen on which the Xv Server
is to accept requests from Xv clients. If the display option is not specified,
Xv uses the display screen specified by your DISPLAY environment variable.
The display option has the format hostname:number. Using two colons (::)
instead of one (:) indicates that DECnet is to be used for transport.
drawable
Defines
the drawable in which video activity is to be reported.
onoff
Selects whether
video notification is enabled or disabled.