From time-to-time I want to transfer only one or a very few photos FROM my PC (Windows 7) to my iPhone (currently an iPhone 6).
I can find plenty of advice on how to transfer from the iPhone to the PC, but there seems to be a dearth (severe lack) of info on how to do the converse.
I have iCloud, Wifi, iTunes, and a cable. I (and I'm sure another of 10K of your best friends) will be grateful for instructions that are "written for grandma." (I'm not a grandma, but I am a late adopter.)