When you place the map on a printer; neither the computer nor Condes know exactly where the map is placed. In order to print a course correctly, Condes needs to be told exactly where on the printed page to put the course.
What you need to do is to tell Condes where the registration marks should be placed on the printer.
Together with the course you have two registration marks. The exercise is to get the two registration marks with the course to match the two corresponding registration marks on the printed page.
Imagine that you have the course drawn on a transparent foil. If you place the course foil on top of the map and you move the foil over the map until the course fits, and the two registration marks on the foil match the registration marks printed on the map.
In the same way as you move the foil over the map, Condes can move the course relative to the printer page, until the course matches with the map on the printer.
However, there are some restrictions on how you can move the course:
We always use one of the registration marks as the "fixed" registration mark. It is called the "fixed" registration mark because it is the fixpoint around which you can rotate the course.
So, to do this, first bring the "fixed" registration mark in place by dragging the course, then bring the other, the "rotating" registration mark in place by rotating the course.
In addition to shifting and rotating the course, Condes can also shrink or stretch the course to fit, in case there is a slight mismatch in the scale of the map used when designing the course in Condes, and the printed map.