Mark UV Seams Toggle
Default Shortcut: Alt + U
Menu Path: UVs/Materials > Mark UV Seams Toggle
This command allows you to mark edges on your object which will correspond to edges in UV space where the object is broken apart when unwrapping. Edges marked as seams will be immediately broken apart in the UV space. Marking seams is an essential part of the Unwrap UVs Using LSCM workflow, but it will also affect UVs unwrapped via any other method.
- See the entry for Unwrap UVs Using LSCM for a description of the LSCM unwrapping workflow.