To split curtain wall frames:
1. Click the Edit Curtain Wall tool from the Building Shell tool set, and click Split Frame mode from the Tool bar.
2. Select the curtain wall to edit.
3. Click on a frame to split it into sections.
A frame can only be split at a frame intersection. A red split cursor displays to indicate locations where the frame can be split.
4. The frame is split, and the resulting sections can be dragged, deleted, or have their settings changed independently.
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