
Use the Pattern commands to create patterns of sketch geometry with or without a bounded area. Sketch geometry outside the boundary criteria displays in a different color and line style for ease of identification. Patterned geometry is fully constrained, and the constraints are maintained as a group. If you remove the pattern constraint, all constraints to the pattern geometry are deleted.
If you remove the associative relationship among pattern elements, the geometry is no longer a pattern, but geometric elements that you can edit individually.

In a sketch, click Sketch tab
Pattern panel, click Rectangular
.
The Rectangular Pattern dialog box opens and Select mode is active by default.
In the canvas, select the geometry to pattern.
In the Rectangular Pattern dialog box, click the selection tool under Direction 1 and then select geometry to define the first direction for the pattern. In the canvas, an arrow indicates the direction.
For Direction 1, enter how many elements to create in the Count field
and how far apart they should be in the Spacing field 
Repeat steps 3 and 4 for Direction 2.
(Optional) In the Extents section, click Boundary
and in the canvas click inside the boundary you defined. The boundary is a sketch either drawn or projected. Specify the inclusion method for the bounded pattern. Choose from:
Include Geometry, all pattern occurrences completely inside the boundary are used for the pattern.
Include Centroids, all pattern occurrences with centroids within the boundary are used for the pattern.
Base Points, click the base point selector
and select a base point on an occurrence, then all occurrences with base points inside the boundary are used for the pattern. To redefine the base point, click the selector and then select a different point as base point. Note, the selection updates when the new point is selected.(Optional) Expand
the dialog box and select advanced options:
Click OK to create the pattern.

In a sketch, click Sketch tab
Pattern panel, click Circular
.
The Circular Pattern dialog box opens and Select mode is active by default.
In the canvas, select the geometry to pattern.
In the Circular Pattern dialog box, click the Axis selector and then select a point, vertex, or work axis to define as the pattern axis. In the canvas, an arrow indicates the axis.
Enter how many elements to create in the Count field
and the number of degrees between the first and last pattern elements in the Angle field
.
(Optional) In the Extents section, click Boundary
and in the canvas click inside the boundary you defined. The boundary is a sketch either drawn or projected. Specify the inclusion method for the bounded pattern. Choose from:
Include Geometry, all pattern occurrences completely inside the boundary are used for the pattern.
Include Centroids, all pattern occurrences with centroids within the boundary are used for the pattern.
Base Points, click the base point selector
and select a base point on an occurrence, then all occurrences with base points inside the boundary are used for the pattern. To redefine the base point, click the selector and then select a different point as base point. Note, the selection updates when the new point is selected.(Optional) Expand
the dialog box and select advanced options:
Click OK to create the pattern.
Do any of the following:


In a sketch, click Sketch tab
Pattern panel
Mirror
(2D) or 3D Sketch tab
Pattern panel
Mirror
(3D)
The Mirror Pattern dialog box opens and Select mode is active by default.
In the canvas, select the geometry to pattern.
In the Mirror Pattern dialog box, click the selection tool under Mirror Line (2D) or Mirror Plane (3D) and then select a line or plane to about which to mirror the geometry.
In the canvas, a blue arrow indicates the line or plane.
(Optional, 2D) If you’re mirroring a spline that intersects with the mirror line, select Self Symmetric to create a single spline that is symmetric about the mirror line.

Click Apply to finish the pattern and create more or click Done to create the pattern and exit the command.