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From: jnmoyne@lbl.gov (Jean-Noel MOYNE)
Newsgroups: comp.sys.amiga.programmer
Subject: Re: Graphic Screens
Message-ID: <9625@dog.ee.lbl.gov>
Date: 6 Feb 91 23:40:48 GMT
References: <91036.163031T32QC@CUNYVM.BITNET>
Organization: Lawrence Berkeley Laboratory
Lines: 18
X-Local-Date: Wed, 6 Feb 91 15:40:48 PST


     The old-fashion (i.e. 1.3) way to open an overscan ViewPort (first, 
don't know if it's different in 2.0, and anyway your program is a 1.3 
program (no tags)):

   It's very easy, to have .. like 16 pixels of overscan on each side:

ViewPort.DxOffset=-16;
ViewPort.DyOffset=-16;

and that's it !! (don't forget to add 32 to your screen's height & width), 
and if you modify the caracteristics of your vp on the fly, don't forget 
to do a MakeVPort, MrgCop & LoadView to update the display.

             JNM

--
These are my own ideas (not LBL's)