I have a Dell Inspiron Windows 8 laptop, and I just went into files, clicked on pictures library, clicked on the one I wanted to enter (not so that it goes huge so it takes up the entire screen, just so that it was highlighted) and clicked on "edit". The edit button was kind of small in the middle/left over the pic. Then I inserted the text. After that, I saved it and entered it!
edit: And for the size, I just resized it. I had to edit my entry a couple of times to get the size right.
~ Fireheart ~ Spikefin ~ Male Bettas ~ Dalihla ~ Lizzy ~ Female Guppies ~ Sir ~ Boss ~ G6 ~ Prayer ~ Male Guppies ~ Squirt ~ Male Dwarf Gourami ~ Reginaldo ~ Regilina ~ Strange ~ Stranger ~ George ~ Mystery Snails ~ Zeus ~ Poseidon ~ Hades ~ Hermes ~ Apollo ~ Serpae Tetras ~ Bristol ~ London ~ Beverly ~ Female Platies