Phil Davis wrote:

Thanks everyone. But... Let me put my question another way:

on mouseUp
   # lock screen -- aka "lock #1"
   wait 1 second
   show img 1
   # unlock screen -- also part of lock #1

   put the milliseconds into tStart
   wait 5 milliseconds

   # lock screen -- aka "lock #2"
   hide img 1
   #unlock screen -- also part of lock #2

   put the milliseconds - tStart & cr after fld 1
   set the vScroll of fld 1 to the formattedHeight of fld 1
   put (the number of lines in fld 1) into fld 2
end mouseUp


I ran the above script x times and got these results on my Apple 20" cinema display & intel mini:

- 50x with no locks/unlocks = 24% of times I saw the img
- 50x with lock #1 = 20% of times I saw the img
- 50x with lock #1 & #2 = 36% of times I saw the img

Ideally I would see the image 100% of the time - that's my goal. I'll experiment with the other methods of displaying the image and see if I can improve my results.

I wonder if it would make a difference to change the wait command to "wait...with messages". I believe the "with messages" option frees up cycles to the OS, which helps it refresh.

--
 Richard Gaskin
 Fourth World Media Corporation
 ___________________________________________________________
 [EMAIL PROTECTED]       http://www.FourthWorld.com
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