Adding a caption to a photo, video clip, project, PDF, or audio clip is like giving it a descriptive title. You add or view a caption in several different places in the Organizer. You can add or view a caption in the Single Photo view of the Photo Browser, the Caption field in Date view, the Properties palette, or with the Edit > Add Caption command. Captions can be used in projects, printed on contact sheets, and viewed in a Flash-based photo gallery.

You can add captions at any time after you bring photos into Photoshop Elements. However, if you plan to use captions in a flipbook or Flash-based photo gallery, you must add a caption before making your project. Otherwise, the caption will not appear in your photo.
Captions can be up to 2000 characters long.
In the Photo Browser, double-click a photo to open it in Single Photo view; select Details, then click the existing caption or the text “Click Here To Add Caption.” Type the caption and click outside the text box.
In the Photo Browser or Date view, select a photo and choose Edit > Add Caption. Type in the Caption text box and click OK. (You can also right-click and choose this command.)
In the Photo Browser or Date view, select a photo, click the General button in the Properties palette (Window > Properties), and type in the Caption text box.
In Date view, double-click a photo to open it in Day view, and then type a caption in the Caption text box in the lower-right corner of the workspace.
In the Editor, open the file and choose File > File Info. Type in the Caption text box.
Select multiple items and choose Edit > Add Caption To Selected Items. Select the Replace Existing Captions option if you want to replace captions. Type in the Caption text box and click OK.
Select the photos; then, in the Properties palette (Window > Properties), click Change Caption and type a caption in the text box.