I have an Artista 630 and I wanted the needle to stay down when I stopped. If you push the button, the needle comes down but when you sew and stop it stays up. I discovered that if you push on the needle down button and hold it a few seconds, when you sew and stop the needle will stay down.
Also, I wanted to do decorative stitches, When doing for example a blanket stitch, when you get to a tip, you want to restart the stitch. The screen tells you which part of the stitch you are doing at any given time. I looked everywhere how to do that and accidentally discovered that if you touch the botton for the stitch again, it restart the stitch.
Good luck with your machine. You will see that by playing with it you will discover the coolest tricks.
Maria