Thanks for your help.
I believe I have the problem solved using scripts.
What I'm building is a customizable database for the study of chess.
There are 64 Container Fields for the chess squares.
The chessmen are jpeg images that are in the container fields.
Filemaker does not seem to tolerate transparent images that allow the color of the container field to bleed through, so for each chessman, there are four (4) possibilities with respect to the color of the chessman and the chess square:
white on white, black on white, white on black and black on black.
If I could solve the transparency problem, I would only have 126 chessmen instead of 256. These images are transparent in Photoshop, but is lost in after pasting the image into a Container Field, so when a black pawn on a dark square should look like this,
it looks like this:
There is no chess engine for playing chess--it is for studying the game.
For the opening study I typically only need to go 1/2 dozen or so moves deep to arrive at the characteristic position, so I accomplish that with a script that copies and pastes the image file for the chessman separating the moves with the resume/pause script command--not an elegant solution but it is functional.
When I run the script, the first chessman "moves", and within the script successive chessmen are moved with the <Enter> key in the number pad of the keyboard, so I can advance forward.
Going backwards and forwards within the same script would be nice--but I have a workaround.
I had a similar problem with a project many years ago when I was animating the "drawing" of Chinese characters, which I did with Flash,
and then ran that "movie" inside a Container field in FM.
I know there are ready-made, off-the-rack solutions, but I'm looking for something tailor-made to my needs, and then FM is fun.
It's all a balance between building a study tool and doing the study itself with all the time contraints.
I'm happy with this project--but it'salways a pleasure to run a project by expert users of FM.