X515C DF & X510C Manual - Lowrance

Local Time highlighted on Overlay Data Shown menu (left). The size of
Local Time data has been changed to Large (right).
3. To change the font size for another Data Type, repeat the steps
above. To return to the sonar display, press EXIT.
Sonar chart with Overlay Data turned on. This example shows
Depth, Water Temperature and the Water Speed of the boat.
Ping Speed & HyperScroll
Ping Speed controls the rate at which the transmitter and transducer
broadcast sonar sound waves — pings — into the water. The unit has a
default ping speed of 50 percent. At normal boating speeds, this automatically
provides enough return echoes to refresh the screen and
scroll the chart at maximum chart speed.
However, when you are running at high speeds, or just want the fastest
possible screen update, you may want to use the HyperScroll feature.
When you change the Ping Speed to any setting greater than 50 percent,
the unit automatically enters HyperScroll mode.
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