HP 54710A User's Reference Manual page 55

Front-Panel Features
Display
Marker results and statistics results area
The marker results and statistics results share the same area. The statistics
results are displayed only when the manual and waveform markers are
turned off, or when the measurement marker readout is turned off.
Softkey menu area
The softkey menus are displayed in this area. Which menu is displayed
depends on the hardkey you press. The Quick Start Guide contains an
explanation of how the softkeys operate.
Memory bar
The memory bar represents the entire waveform record. The highlighted
part of the memory bar represents the portion of the waveform record that is
currently on the display. When possible, the acquisition hardware is set up
so that all of the waveform record is displayed on the screen. When the
waveform record contains more data than the display has resolution (number
of pixels), there can be more than one data point per pixel column on the
display.
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