CompuServe Messages

Thanks for the good stuff on using 'masks'. I've tried to round up all I can on Alpha Channel – but I still can't get the concept straight. Will you explain it to me, please? I suspect that eventually the APAssist and Amiga Guide (with APAssist winning out) method of diseminating docs will be preferred, but I must confess that the 'change-over' from regular printed docs is sometimes frustrating.