A caption turns a photo into something that explains itself, which matters when it is going into a group chat or a listing without you there to describe it.
White text on a photo disappears the moment it crosses something pale. An outline in the opposite colour keeps it legible no matter what is behind it, which is why memes have always been set that way.
Keep captions short. Text across a picture is read at a glance, and anything longer than a few words will be skipped.
The caption is drawn at the photo's full resolution, so it stays sharp when the picture is viewed large or printed.
Faces and the main subject are usually in the upper middle of a photo, so a caption along the bottom tends to cover less. A caption along the top suits a picture with sky or empty space above the subject. Using both gives the traditional two part layout.
Choose a colour that stands out against that part of the picture, with the outline kept on so it always reads. Look at the preview before you save, because the text is written into the picture and cannot be edited afterwards.
Captions sit top and bottom. For text anywhere on the picture, the watermark tool places a mark in nine positions.
Not yet. One strong condensed face is used, chosen to stay readable at small sizes.
No.
Yes. Type something in each box and both are added. You only need one of them for the tool to work.