Tools > Automatic Reconnect changes a boundary from one object to another. You most commonly use Automatic Reconnect after you copy, move, or mirror systems (including through Model Data Reuse and Model Data Transform operations in the Project Management task) without including a boundary in the copy (by selecting Edit > Paste > Delete Optional). These copy operations replace the boundary with a standalone plane boundary. After the copy, you can replace the standalone plane with a new boundary by using Tools > Automatic Reconnect.
You can also make other boundary changes, such as changing the boundary of a plate system from a reference plane to a plate system, or from a seam to another seam.
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