# Area profile line/Fill
Use Area Profile/Fill to customize the fill model plane area.
How to add:
1) Click the [Area Profile/Fill] command.
2) Select the model surface you want to fill in the viewport.
3) Select the pattern to fill in the dialog box.
4) Click OK to finish filling.
How to modify:
1) Select the pattern you want to modify in the viewport.
2) Modify the parameters in the dialog box that pops up.
3) Click OK to finish modifying.
How to delete:
1) Select the pattern you want to delete in the viewport.
2) Press Delete to finish deleting.
Dialog box control description:
Section Line, monochrome, None: Select the type of fill pattern.
Style, Scale, Angle: When selecting the section line type, set the section line specific pattern.
Select model face: Select the face you want to fill.
Line width: Set the pattern line width, check default to use the default line width.
Color: Set the pattern color, check default to use the default color.
Layer: Set the layer to which the profile line belongs.
Note: Only surfaces that are flat in 3D can be filled.