It seems doesn't execute FvwmEvent deiconify DeThumbnail. I'v figured it out how to works (thanks for this tip goes to heelsleeh).
Here is the way:
change FvwmEvent to FirstEvent like this
`FirstEvent: deiconify DeThumbnail add FirstEvent to StartFunction +I Module FvwmEvent FirstEvent`
It seems doesn't execute FvwmEvent deiconify DeThumbnail. I'v figured it out how to works (thanks for this tip goes to heelsleeh). Here is the way: change FvwmEvent to FirstEvent like this `FirstEvent: deiconify DeThumbnail
add FirstEvent to StartFunction
+I Module FvwmEvent FirstEvent`done