Hey guys. I have started to learn how to sight read on the guitar and found a lesson to be confusing. It says in the book that the quarter note that appears on the + after 1 should be sustained until I reach 2. As far as I know sustaining a note is letting it ring, but how come it isn't written like I wrote it in the 2nd bar? Isn't it the same thing? I attached the bars, someone please clarify this for me. Excuse my MS Pain skills. It all 4/4 by the way.