Zoom tool
You can zoom with the 
(Z key) using Left click and Right click to zoom-in and zoom-out respectively. Or pressing the left mouse button, and dragging the mouse from left to right to zoom-in, or right to left to zoom-out.
You can also see/change the zoom level from the status bar slider:
Or using other alternatives:
- With keys 1, 2, 3, 4, 5, 6 (those above the QWERTY keys), to change the zoom to 100%, 200%, 400%, 800%, 1600%, 3200% respectively.
- The mouse wheel (details).
- Or since v1.3-beta12, you can configure a key to zoom pressing a key (and hold it down) and move the mouse in a specific direction.
SEE ALSO