# Form A New Subassembly

Use the Generate New Subassembly function to lower the level of the part in the assembly by placing the existing part in the new subassembly.

How to use：Select one or more parts belonging to the same level in the assembly document, right-click the "Generate new sub-assembly" option, set in the pop-up dialog box and click OK.

Parameter description：

Parts to be moved: Parts can be picked up or removed.
Warning: Parts that have been array, mirror, stretch cut will have their corresponding features removed, but will not be removed if they are just referring to part elements for direction, generating benchmarks, etc.
Generate new document: Check this item to generate a new assembly document in the same path as the final assembly; Do not check this, only the sub-assembly is displayed in the assembly, there is no document in the list, can not edit the jump.

Function description：

Under Topdown, this function is not supported when editing sub-assembly.
When selecting the subpart operation of the subassembly, completing the operation directly in the subassembly does not need to enter the Topdown state.
When two parts have a fit, but only one of the parts is moved, the fit remains in the top assembly; When the two parts are matched and moved at the same time, the fit will be moved to the sub-assembly; When multiple parts move to cause coordination conflict, coordination red, wrong coordination can be edited and modified.

Note：This operation does not support cancellation.