How do I add or edit the location of an existing post?
You can add a location to a photo or video you've already shared or edit the location you originally included. To add or edit your location, first tap 
- To add a location: Tap Add Location... and enter the location.
- To edit a location: Tap the location name, then tap Remove Location or Change Location (iOS) / Select Other Location or tap "X" from Select a Location Page (Android).