Learn about new enhancements to the Mirror command.
A new Associative Placement check box enables creation of an independent Mirror. The initial position of target independent components is mirrored. After the independent mirror is created, you can move the source component. Uncheck the Associative Mirror box to return the position of the target to the mirrored position. Note that in this case the Mirror plane isn't displayed.
When the pattern is changed back to the associative position, only the generated constraints between target and source are suppressed (not between source and source).
The following edits will reset the target position during edit of the Independent Mirror when:

During the Associative Mirror pattern you can select the Create flat structure option to convert an existing Associative Mirror to a flat structure mirror. It's enabled only for the top-level patterns.

A new Status command enables creation of part features in the target documents for Flat Mirror and Associative Mirror. Note that for associative mirrors, a part with Create mirror with recipe state won't be updated after modifying the source. Note: This is only supported for part components with a solid body.
A new option is added for the Flat Structure Mirror for the Reuse state to be able to save copy as. It applies the save state only to the first level (parts + sub-assemblies). To apply save to other nodes, use Save Copy As again.
This option is disabled for:

For the Flat Structure Mirror, a new option is added enabling you to create a mirrored copy of the selected part and break the associative link to the source. This option can only be used for part components, however it's not supported for:
Break link is not allowed for the reused components.
The Mirrored Parent:
For Flat Structure Mirror, use the new option to suppress the link between the source and the mirrored object. This option can only be used for part components, however it's not supported for:
For more information see To Mirror Assembly Components.