Avidyne IFD540 Pilot's Manual page 93

Weather Product Grouping
Title/Category
Weather Layers
Airport Reports
Weather Reports
Lightning
Selections can be made by either touching the desired product or
by using the bottom right IFD knob.
Note that when there is an on-board lightning sensor selected
(Avidyne TWX670 Tactical Weather System or L3 WX500
Stormscope), the "Lightning" grouping will also include a "Clear
Strikes" function key.
Use the bottom right IFD knob to adjust altitude slices for icing
and wind products. Note that the IFD knob will only adjust the
weather product slice if the product is being displayed and is
valid; otherwise it still controls the map range and view.
Choices may include "METARS", "AIR/SIGMETS":
Map Pages 3-17
Possible Selections Within
the Grouping
US Wx Radar
PR Wx Radar (Puerto Rico)
CN Wx Radar (Canada)
Storm Cells
Icing
Winds Aloft
METARs
AIR/SIGMETs
Datalink
Sensor – Strike
Sensor – Cell
Sensor – Clear Strikes