# Pattern Drive Component Pattern

In an assembly, parts are grouped into similar arrays by referring to a set of arrays. Its command interface is shown in the figure below.

Array driver An array is an array in two directions for the top-most instance. If a subinstance is selected in the viewport, the array is still applied to the top-most instance. The controls are described as follows:

Parts to array: Pick up the parts that you want to array.
Drive features or parts: Select a list of features or parts as the array driver source (pick up the features associated with the name part shown in the box).

The array feature can be selected in the feature panel (i.e. the array feature in the current assembly can be applied as the driver)
Parts generated by the array, or faces generated by array features in the part, can be picked up in the viewport.

Modify Source location: After this parameter is selected, the Source Location Instance pickup box is displayed.

After clicking the "Source Location Instance" pick box, a pick point appears on each instance of the source array (including instances skipped in the source array), select a single point. The location of the parts you want to array in the new array corresponds to that point.

As in the image above, select the first point, the blue part as the first part in the new array; Select the third point, the blue part, as the first part in the new array.

Skip Instances: The same function as skipping instances with linear arrays.

Example： Array the linear array of the instance reference hole, after setting the parameters, the effect is as shown in the following figure.