The CAD Alignment method is to establish a minimum of 6 points on the model then measure these same points on the part.

This differs from a Datum Alignment in that there is no iteration of the measured points. This method works well to establish a rough alignment prior to performing a Datum Alignment.

First pick the CAD icon

Select the Pick button and select at least 6 points on the model. These points should "define" the alignment.

Once this is complete select the Measure button and measure the same points on the part.

At the completion of the measure routine the RMS (deviation between the picked point nominal and the measured nominal) will be displayed. If this value is acceptable click to Confirm.

Here is a video demonstrating the CAD Alignment Method