# Faces
This section describes how to work with faces in the Flow360 geometry editor. They are geometric entities representing surfaces that are a part of your model.
Faces in Flow360 can be used for the following things:
- Define specific regions for mesh refinement
- Specify boundary conditions
- Group important geometric features like wings of an airplane or underbody of a car.
# Face Selection
You can select faces in the geometry editor using selection by clicking on the face. You can adjust your selection options on the central toolbar.
# Grouping Faces
Face grouping allows you to organize and manage faces in your geometry. You can group edges based on their attributes such as faceId, faceName, groupName. The attributes must be assigned in your CAD system.
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