Pfaff tension issues
 

I have my new-to-me QE 4.0 and I am trying to use two different color threads - one in the bobbin, one on top. I'm getting very slight show thru of the bobbin thread (it's the darker one, matching the back of a mug rug). I know it's the tension, but for the life of me, I cannot find where to adjust the tension on this new machine! Can someone help ASAP????

look at the screen. Look down to the bottom right you should see a setting 4.6 or 4.8. move the arrow down with you styles. hope this helps