Manalto, I would suggest that you make a few trial squares in which you try different tension/stitch lengths on your machine. Write on the sandwich the settings you used. Use these guides when you are trying something new to see which setting (based on fabric weight, batting weight, backing weight and thread) gives you the look you want. Punch holes in your sandwich and create a "notebook" for reference. I have several such notebooks and you don't have to keep it all in your head. Have fun.