how to store imagedata in a custom property?

[viktoras didziulis]

but ctrl+z is a single step undo, isn't it? I haven't done this with 
imagedata, but for text changes in fields I store the text of field in 
an array 'undooArray' before each space, enter, return, backspace, 
delete, dot, comma, colon, paste, copy, cut, insert (or any other action 
of context menu) in that field. Then I can undo or redo as many times as 
I like by adding or subtracting from current key of the array. E.g. undo 
as put undooArray[currentKey - 1] into fld myField; redo as put 
undooArray[currentKey + 1]. Only available memory sets the limit.

best wishes!
Viktoras

J. Landman Gay wrote:
> Tiemo Hollmann TB wrote:
>> I want to provide my user a undo function in the standalone with the 
>> brush
>> tool, not while developing.
>
> In that case you may need to write a commandKey handler that traps for 
> "z" and issues the "undo" command. If you have menus with that 
> keyboard shortcut, they should work too.
>
> By the way, what is "AW:" in the subject line?
>