How do I Move/Scroll Background Chunk At A Time

I want to advance the background forward and backward by clicking on a forward arrow and a backward arrow by a set pixel amount at a time, say 300 pixels at a time. How would I go about doing this?

Many ways to do this..

Easiest way might be using a sprite with the scrollto behaviour and moving it the wanted amount on click..

You could use the bullet behaviour in the way it is used in the move to example shipped with Construct2.