This may seem a little off topic but I have a group photo of some 30 to 40 people, in some cases just heads and shoulders which I would like to be able to annotate using arrows with identifying numbers which can be listed in a spreadsheet against the relevant names. My only previous experience in marking up photos is by using the somewhat crude editing tools bundled up in photo software with the inevitable clunky results. Can anyone advise me if it is possible to achieve the required more professional results using Google Photos?