At this point in the development of my site, I have not created any custom breakpoints. My Tablet and Desktop breakpoints are the standard 751 - 1000 px and 1001 pixels and up, respectively. However, my breakpoints seem to actually occur 15 pixels after each of the standard breakpoints. So instead of the Tablet breakpoint occuring at 751, it actually occurs at 766. Same thing for the Desktop breakpoint – instead of occurring at 1001, it occurs 15 pixels later at 1016.
I guess I can just make a mental note of that and move on, but I want to be sure there’s not some setting I inadvertantly set or something else on my end that will come back to bite me later on down the road.