There are a few things that I love having when I am sewing, a few things that I am so glad were invented! The Clearly Perfect Angles sheet is one of those things and this is something I hope you get for yourself and learn how to use.
This is a clingy sheet that you cut a small rectangle out of where the feed dogs will be, and you lay it on your machine. It will stick to the machine, so it won’t move, and you can sew half square triangles without marking your fabric! See the black and green lines down the center, that is what you line your fabric up with.There are 1/4″ and 3/8″ seam guides, and you can start sewing from the moment you lay this down on your sewing machine. This is shown on my machine and it hangs over the edges a little, I just press them down and the material clings to my machine. Nothing interferes with my sewing at all.