How do I change my location?
There are different answers depending on which location you are referring to.
The location of posts you see on the main posts page is based on the groups you are a member of and your post settings. You can add and remove groups on the Groups page at any time. And you can change your post settings using the post options on the Settings page.
If you're trying to change the location that shows up on your posts (either the location text or the map), you can edit your posts to change the location of the post. And when you submit new posts, make sure to check that the Location field on the New Post page has the correct location.