Think of a CC3 drawing as a virtually unlimited sheet of graph paper on which you make a life-size drawing of the fantasy world you are mapping. CC3's drawing window is like a camera lens focused and centered on part of that unlimited paper.
Through the lens of the drawing window you can zoom out to see your entire drawing (reduced to fit the screen), or zoom in for a magnified view of a detail. Later, when you use a printer to get a paper copy of your work, you can print it to fit the paper or to any scale. You can draw entities using visual cursors; later you may wish to get more precise control of locations that you pick by locking to entities or by "snapping" to CC3’s visual grid.