1. If other displays and data are already loaded, select the Edit->Remove All Displays and Data menu item or the icon in the toolbar to clear them out.
2. Load some aircraft track data.
   • Open the Data Source Chooser.
   • In the Data Source Chooser click on the Files tab.
   • Go to the point data directory: /data/idv/trajectory/.
   • Select track.nc
   • Under the Data Source Type pulldown menu, select "Track files"
   • Press Add Source
3. Create the display
   • In the Fields panel open the Track node and select Dew/Frost Point Temperature.
   • In the Displays select Track Colored By Parameter and press Create Display
4. Add a background image to see where this track is with the Displays->Maps and Backgrounds->Add Background Image menu item.
5. Leave the data source and display as is.

Unidata IDV Workshop for version 2.7u2 > Accessing and Displaying Data > Trajectory Data