On some platforms, you can't change the crop after publishing. You'll need to delete your profile picture first and then upload it again.
On other platforms, you can at least change the selected section by moving or resizing it.
Click the platform you want.
In the cropping window, move the section or drag the blue edges to make it bigger or smaller.
You can also have a crop created automatically (Automatic crop) or reset the crop completely (Reset)
