Yaesu FTDX10 Operation Manual page 22

Information displayed on the scope screen
CENTER : The receive frequency is always shown at the center of the screen and spectrum display.
The band spectrum is shown within the range set by "SPAN".
The CENTER mode is convenient for monitoring the signal activity around the operating
frequency.
CURSOR : Monitors the spectrum within the range set with "SPAN". When the frequency (marker)
exceeds the upper limit or the lower limit of the range, the screen is automatically scrolled
and the status beyond the setting range can be observed.
FIX : Enter the start frequency of the scope.
SLOW1 : sweep speed
SLOW2 : sweep speed
FAST1 : sweep speed
FAST2 : sweep speed
FAST3 : sweep speed
SPAN nnnkHz : Scope Screen frequency span (display range).
Scope screen information
Slow
↑
Normal
↓
Fast
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