Hi Guys I have this small Issue

I have a created a form in that form i have created picture frame for
Width 800 High 400

In That picture frame I have add it picture which dimantions are

Width: 800
High: 3095

Like I said Picture is very long I have created a form to match the width of the picture as for lengh I would like to add scroll to the picture so people can scroll up and down as they wish to see the picture

Whats the easyest way of doing this Thank you