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psion/opl #1149, from gareth, 245 chars, May  6 18:46 94
Comment to 1136. 
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I use gprintb and change the start variable to achieve scrolling.

ie.     gat 10,ypos% 
        gprintb "Your Message",length%

Then each time you press the up/down key you can increment/decrement 
ypos% to suit.

Hope this helps.

- Gareth -