If I go to open a pdf file in My Files, a printer app opens.  I'm forced, every time, to go back, long press on the file in question, click on those three dots(More), Open with ... and go from there.  A bit tedious.

I've looked in Settings / Apps / Choose default apps ... to see if I could solve this issue there, but I'm stuck. 

Is there a way to make, say, Samsung Notes (PDF reader) the default program when first opening a pdf file?