OVER - how it works?

[oblo]

Hi all

While testing my last game, I come with some issue that makes me wonder if I understood well how OVER works. AFAIK, OVER 0 is the default mode, so if I have...

Code:

OVER 1
PRINT "Hello";
OVER 0

... last OVER 0 will affect all screen and all PRINT, DRAW, CIRCLE, PLOT commands? Affect sprites that are already draw in screen? I had a strange behaviour with the sonar so I had to make a workaround. Anyway, I'd like to know how OVER really works.

Thanks and cheers.