Avidyne IFD540 Pilot's Manual page 88

For those hotspots that are an airport and typically have METAR
data associated with them, a METAR page can be appended to
the map info popup boxes as shown in the middle example image
above.
TIPS AND TECHNIQUES
METAR page on Map Popup Pages Delayed
If the airfield being touched to generate the map info
popup box is not in your active flight plan or nearest
list, there will be approximately a 1 second delay
before the METAR page will created. This can be
avoided by dwelling your finger on the airfield of
interest for approximately 1 second or touch the
airfield a second time to give the system time to
generate the METAR map info popup page.
NOTE
Map Pop-Up Boxes Only Via Touch
Map pop-up boxes can only be accomplished via
touch screen use. There is no physical bezel
control to support the feature.
3-12 Map Pages