Grab the screen and move left right up or down

Zoom in 2 times multiplier on screen center

Zoom out 1/2 times multiplier on screen center

Zoom area.  Move to zoom window and pull out a rectangle of the zoom area

Zoom extents (plus 250 m)

Zoom on radar view calculation point CoRTN only

While digitising the height of the object is entered here.  Enter the height prior to digitising.

This button starts the digitising

This stops the digitising

This loops back to the first digitising point in the digitising sequence

This is used to display a slice view window between two points on the map

This loads a project map as a backdrop on the digitising screen.  The map may be at any scale and any orientation

This removes the map

This saves the map to file with any contours overlaid on the image