Path: utzoo!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!bloom-beacon!think!ames!oliveb!sun!DATJN@NEUVM1.Bitnet
From: DATJN@NEUVM1.Bitnet (Jakob Nielsen Tech Univ of Denmark)
Newsgroups: comp.sys.mac.hypercard
Subject: Visual effects on overhead projectors
Message-ID: <81135@sun.uucp>
Date: 12 Dec 88 17:14:48 GMT
Sender: news@sun.uucp
Distribution: comp
Lines: 17
Approved: hyper-hackers%plaid@sun.com

I give a lot of lectures and tutorials on hypertext and usually
illustrate them with "live" examples running on the Macintosh.
Many of these are HyperCard stacks and use the visual effects.
Unfortunately (just as on a non-2-grayscale Mac II) the visual
effects have not been shown on the projected screen image used
for the audience. I have used a few different transviewers (transparent
screen duplicates put on an overhead projector to generate a large
projected image) and until recently always had this problem.
Last week I gave my tutorial at the ACM Conf. on Document Processing
where they had a transviewer from Sharp - and it worked with the visual
effects||

I don't know what the  factors are which determine whether HyperCard
visual effects are shown on a projected screen image. But until
HyperCard is changed to use visual effects on all types of screens,
this should be a parameter taken into account when buying screen
projection hardware for your Mac.