A region attachment is a rectangular image. It gets the name "region" because at runtime (in your application) it is typically drawn using a region from a texture atlas.
The region attachment's transform cannot be keyed in animations. Instead, the region attachment's bone can be keyed.
See the common attachment properties for the
Set Parent properties.
When the image path is blank, the region attachment's name is used to find the image. When the image path is set, it is used instead of the region attachment's name. See image file lookup for more information.
Mesh checkbox changes the region attachment into a mesh attachment. See meshes for more information.
The region attachment's translation is the location of the center of the image. If it is important for an image to align with world coordinates (ie screen pixels) and the image has odd dimensions, then it needs to be offset by