Thanks. That did the trick. My addition of -scrollregion was actually a last minute stab and it had some effect in the left direction but not for moving the right arrow. I had really meant to leave it out before putting my example up on the forum.

Anyway, when I changed the program line, thus:

    -scrollregion   => [ 0, 0, $width, $height ],
[download]

everything worked just as advertised. Thanks again. Tom