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@@ -616,6 +616,16 @@ It has two values: 'off'(0) and 'on'(1). The default is
.B 'on'(1).
.TP
+.BI "XV_CRTC"
+XV_CRTC is used to control which display controller (crtc) the textured
+adapter synchronizes the screen update with when XV_VSYNC is enabled.
+The default, 'auto'(-1), will sync to the display controller that more
+of the video is on. This attribute is useful for things like clone mode
+where the user can best decide which display should be synced.
+The default is
+.B 'auto'(-1).
+
+.TP
.BI "XV_BICUBIC"
XV_BICUBIC is used to control whether textured adapter should apply
a bicubic filter to smooth the output. It has three values: 'off'(0), 'on'(1)