Mouse Control

Operating functions of the mouse in the system are presented in Figure 1, in which from left to right five typical usages are:

1. Single click on the left key to select or pick map items (e.g., point, line, polygon and marker);
2. Hold on the left key and drag the mouse to pan the map;
3. Scroll the mouse wheel down to zoom out and up to zoom in;
4. Click on the mouse wheel and drag the mouse for tilting;
5. Click on the right key and move the mouse up to zoom out and down to zoom in;