Agilent Technologies 54810A User's Quick Start Manual page 65

Tab Display Area
The tab display area located beneath the waveform viewing area appears
when a measurement is on, mask testing is enable, a histogram is
enabled, markers are on, or color graded persistence is on.
Figure 3-17
Tab Display Area
The display area shows information and statistics for the particular tab
that is selected. The type of markers that are shown in the waveform
viewing area depend on the tab that you have selected. The selected
tab has an orange border to reflect the type of markers being displayed.
For example, when the Histogram tab is selected, the markers are
histogram markers and are used to define the histogram window.
Waveform Display Area
The waveform display area shows the waveforms, and optionally, the
results of your measurements. Several display options, including a grid,
are available and can be configured using the graphical interface.
Using the Oscilloscope
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