In this video I make a test piece that helps in understanding, and remembering, how to set my quilting machine and iQ to get the stitch length I prefer. This can be a challenge for new iQ owners so taking a little time to do this is well worth it. I am using IntelliQuilter on my Gammill Premier whic has the IntelliStitch stitch regulator. I am stitching on an old sheet with scrap batting.
After doing these simple lines, sew a few more lines where you change both the settings on iQ and your machine speed. Make clear notes on the fabric.
I encourage you to stitch many samples - more than I show in the video. Label them so you have a quick reference guide. With experience you will get to know your settings but this is a good way to start out.