Trace Zoom Feature

The zoom feature is used to magnify or reduce a portion of a trace. Two zoom modes are available:

Time zoom	Used to expand/collapse the time-base in order to have a better view of the signal evolution through time. This zoom operation updates the time-base value.
Amplitude zoom	Used to have a better view of a part of a signal. This zoom operation updates the amplitude & zero offset value

The zoom operations can be done:

• By modifying the corresponding values by hand
• By using the mouse wheel

For more details on setting the amplitude, zero offset and time-base values, refer to (➜ # 1, Setting Scale).

Mouse Shortcuts

Action	Result
Scrolling up the mouse wheel	Expands the time-base value
Scrolling down the mouse wheel	Collapses the time-base value
Pressing the Ctrl key while scrolling up	Makes the amplitude value greater
Pressing the Ctrl key while scrolling down	Makes the amplitude value smaller

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• When performing an amplitude zoom, the zero offset is automatically set by the cursor position.