img src
Then type in an equal sign and a quote symbol.
Then paste the photo's URL address, like this one:
https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcReGe4xdRc83bGaT3T6d3OQCbJRVKM1W6gwkbNXPuUt5aAVUeTa_w
After the URL, type in a closed quote symbol and the > symbol. So the end product looks like this: