Vanilla Key, 277 - queue limit, 277 VBEAM counter, 601 VBR, 517 Verify - requester, 211, window sizing, 91 VERTB, 519, 525 VERTB interrupts, 519, 525 VertBServer, 527 VGA Mode 3 - 8514/A, 537, 561 Video Parameters - Intuition control, 38 Video priority - in dual-playfield mode, 545 VideoControl() --> View - origin, 62, preparing, 551 View Structure, 64, 66, 551 - function, 540 ViewAddress(), 64, 76 ViewExtra, 551 ViewExtra structure, 568 ViewPort --> ViewPort Structure, 39, 64, 66, 187, 552 ViewPortAddress(), 64, 76 ViewPortExtra, 551 ViewPortExtra Structure, 59, 63, 86, 551, 553 - DisplayClip, 46 Virtual terminal, 27 - window, 77 Visible Area - screen, 40 Visible Display - easy request, 217 Visitor Window, 82 VSOVERFLOW Flag - in VSprite structure, 624, reserving Sprites, 632 VSprite --> VSprite Flags - and True VSprites, 624 VTAG_USERCLIP_SET, 603 VUserStuff, 651