I am getting very frustrated with using a printer with this Chromebook. I had a different Canon printer for a few years and had nothing but trouble trying to print. So I bought a Canon Pixma TS3722 that is supposed to be compatible to my CB. At first it worked fine, then it kept trying to bring my old printer up and I dealt with that, now it is bringing up PDF. The info I find tells me to make my new printer the default but when I try to follow directions to find where to go to do that, none of it is there.

Can anyone tell me where to go on this Acer 315 CB?