In addition to the zoom gestures supported for zooming in the X dimension, when over an analog waveform, additional zoom gestures are available. See the following figure.
Figure 1. Analog Zoom Options

To invoke a zoom gesture, hold down the left mouse button and drag in the direction indicated in the diagram. Where, the starting mouse position is the center of the diagram.
The additional zoom gestures are:
- Zoom Out Y: Zooms out in the Y dimension by a power of 2 determined by how far you release the mouse button from the starting point. The zoom is performed such that the Y value of the starting mouse position remains stationary.
- Zoom Y Range: Draws a vertical curtain that specifies the Y range to display when the mouse is released.
- Zoom In Y: Zooms in toward the Y dimension by a power of 2 determined by how far you release the mouse button from the starting point. The zoom is performed such that the Y value of the starting mouse position remains stationary.
- Reset Zoom Y: Resets the Y range to that of the values currently displayed in
the Wave window and sets Y Range mode to
Auto.
All zoom gestures in the Y dimension set the Y Range analog settings. Reset Zoom Y sets the Y Range to Auto, whereas the other gestures set the Y Range to Fixed.