Someone should write an ultimate tutorial on this topic, as it is very hard to grasp, and there are so many parameters to deal with.
It seems very hard to grasp the concepts, as this is a kind of relativistic type of programming because of varying device resolutions and aspect ratios. Maybe a tutorial with illustrations would help?
I wish I had the time to do it, but I don't... What happened to Daniel the tutorial wizard?
Maybe an official howto from TGC? Maybe a whole chapter on the subject, by Allistair the AppGameKit programming book master?
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AGK programmer
Did Amiga / AMOS programming in the 90's.