==== How to visualize data on track line ====
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This how to assumes that you have already opened a gpx or kml file in GPX Viewer. If you haven't opened it yet here is [[docs:faq:how_to:open_file|How to open gpx or kml file]].

Below are step-by-step instructions on how to visualize data on the track/route line. 

  - Open **left main menu** in GPX Viewer.
  - Tap on **Settings** button.
  - In Settings tap on **Track/route** button.
  - Then scroll down and tap on **Color line by data option**.
  - In dialogue select from the drop-down menu under **Data:** caption for example Elevation. Note that the track/route you have opened from the gpx or kml file must contain Elevation data.
  - Then from drop down menu in dialog under **Gradient mode:** select option **Dynamic (based on track stats)**. This option will adjust the color legend according to the track data.
  - Then tap on **OK** button.
  - Go back to the map screen and preview that the track/route line is colored by selected data. Also, note that at bottom of the map, there is shown legend showing which colors represent which data values.
  - When you tap on this legend you can change **Data** and **Gradient mode** options as in the Settings screen.

Below is a video showing the instructions above:

[[https://docs.vecturagames.com/gpxviewer/lib/exe/fetch.php?cache=&media=docs:faq:how_to:visualize_line_data.gif|{{ docs:faq:how_to:visualize_line_data.gif }}]]