There are four buttons which you can use to change your view of the map – Zoom in, Zoom out, Pan and All.
PTMapper has two buttons to allow you to zoom in and out of your maps – both buttons work in the same way.
Zoom In also has an alternative method, which lets you quickly zoom in to a small area of the map.
Pan allows you to move around the map and All lets you revert back to an overview of your entire map.