QtVlm zoom on map
Zoom on selection :
1. Select a zone : 1 left click on the map, drag the mouse with the left button pressed to select an area.
2. Click on the button "Zoom on selection"
NB : You can preset 4 map configuration (position and zoom level) with Ctrl+F9 to Ctrl+F12, then you can recall them with F9->F12 (click on the map first and then press a function key)