Zoom Level Selection

View Menu

From the View menu, choose Zoom Level, and choose Selection from the submenu to maximize a selected area vertically and horizontally.

To zoom in and out vertically by small increments, press Shift+Up Arrow/Shift+Down Arrow or use the Zoom buttons on the lower left-hand side of the data window:

Press Ctrl+Up Arrow (when a selection is active) or double-click the Level Ruler.