1. Click the Zoom Vertically icon  to enter the mode.
   
   
2. Press and hold the left mouse button to position the start of the zoom.
   
   
3. Drag with the left mouse button to position the end of the zoom.  
   
   
4. Release the mouse button. The window will zoom in. This can be done on any of the tracks, the depth track, any log curve tracks or on a synthetic track and in any of the wells.

Note: All tracks and all wells will be zoomed.  Use previous zoom to restore the original zoom if needed.