Activate/Deactivate geolocation

Choose Edit ▸ Preferences.

Select the Location tab.

Select Publish location to my contacts to activate geolocation.

To deactivate geolocation, deselect it.

To increase the accuracy of your position, deselect Reduce location accuracy.

If you have an external device like a GPS or want to send a more accurate position, select the appropriate option in the Location sources section.