Add reports after the merge- and separate animation operators are run. This helps to clarify that these are limited in their use with the NLA. The motivation for this comes from a [comment][1] on a different issue. [1]: https://projects.blender.org/blender/blender/issues/135894#issuecomment-1520306 Co-authored-by: Sybren A. Stüvel <sybren@blender.org> Pull Request: https://projects.blender.org/blender/blender/pulls/135920