Forward Button
Select the graphic item you want to be the forward button and select Hyperlink from the Edit menu. Click on the External Tab and choose "javascript:" from the Protocol pulldown. Paste the following in the large field in the center of the dialog:javascript:history.go(1);
Back Button
Repeat as above but change the code to:javascript:history.go(-1);
Note: the buttons won't actually work if there is nothing in the browser history.