READING:Manual pages of the commands described here

Moving the cursor to the left or the right border of the screen will move the background image to reveal its hidden sides.

on exitFrame me
    -- Moving the cursor to the left or right side of the screen 
    -- (within 10 pixels from the screen border), reveals the larger picture
                         
    -- screen size is assumed 320 by 240
    if (the mouseH < 10 and sprite(1).locH >0) then
       sprite(1).locH = sprite(1).locH - 5
    end if
                         
   if (the mouseH > 310 and sprite(1).locH < 320) then
      sprite(1).locH = sprite(1).locH + 5
    end if 
 end

Do you like the way the background screen is moving? Notice that there is something unnatural with the movement of corto maltese in the background. How do you fix it?

The movement would be more believable if you had the right cursor indicate the kind of scrolling you are expecting. Add the appropriate cursor in your solution.

In an earlier tutorial we learned how to move an item around using the movableSprite property. Here is another way of picking up and moving an image around without using the 'moveableSprite' property. It can be used in conjunction of other code (like monitoring the degree of movement, etc.)

 -- clicking and dragging the image will allow moving it around.
 on mouseDown me
     global moving
     sprite(1).loc = the mouseloc
     moving = 1
 end

 on mouseWithin
     global moving
     if moving = 1 then
        sprite(1).loc = the mouseloc
     end if
 end

 on mouseUp
     global moving
     moving = 0
 end