As you become proficient with solid modeling, you learn that having your part geometry oriented relative to your file origin provides certain benefits during assembly. The supplied 2D DWG drawing was created so that the geometry is symmetrical about the sketch origin point when inserted into the Autodesk Inventor sketch The origin point is the X-Y 0, 0 coordinate. You take advantage of the origin planes of each part as you position the parts using assembly constraints. Display these planes now.
Click in the following image to play an animation that shows the results of displaying the panel origin planes.
The Place Constraint dialog box activates.