Entire Map:

Displays the entire map in the map window.

Redraw:

Redraws the contents of the map window.

Measure Distance:

Allows you to measure the distance and the angle between two points in the map window.

The mouse pointer will change into a pair of compasses, then:

• draw a line between two points of interest.

Pan:

Allows you to roam through the map window when zoomed in.

The mouse pointer will change into a hand, then:

• click somewhere in the map window, and drag this part of the map window to another position.

Zoom In:

Allows you to zoom in on a selected spot or area in the map window.

The mouse pointer will change into a magnifying-glass with a large plus inside, then:

• click in the map window to zoom in on that position with a factor 2, or
• drag the mouse pointer in the map window from one corner of interest to another (any zoom in factor).

Zoom Out:

Allows you to zoom out from a selected spot in the map window.

The mouse pointer will change to a 'magnifying'-glass with a large minus inside, then:

• click in the map window to zoom out with a factor 2, or
• drag the mouse pointer in the map window from one corner of interest to another (any zoom out factor).

Select mode:

Allows you to select one or more existing points to be edited. The mouse pointer will change into a little hand.

To select:

• a single point: click or double-click the point;
• multiple points: hold the Ctrl key on the keyboard and click the points you wish to edit;
• all points within a rectangular area: drag a box around the points of interest.

You can also press the Esc key on the keyboard to go to Select mode.

Move Point mode:

Allows you change the position of an existing point. The mouse pointer will change into a little pair of tweezers.

• Select a point, and drag the point to a new position.

Insert mode:

Allows you to insert new points. The mouse pointer will change into a little pencil.

Undo All Changes:

Undo all changes you made after the last Save.

If you have not used Save so far, all changes since you started editing will be undone.

Save:

Save the changes you made so far. In principle, all changes are directly stored on disk. Using the Save button however, will reduce the amount of restores that will be made if the Undo All Changes option is used later on.

After you used the Save button, you can only use Undo All Changes again after you have made some further changes.

Exit editor:

Leave the editor and keep all changes. The editor will be closed but the map(s) remain displayed in a map window.