However, if the JPEG image is removed from the source, the caption will likely be lost. You can use many methods to add captions to images, particularly if you add the images to a publishing medium, such as Web pages, rich text documents or presentations. 4 Put Borders Around Pictures on Google Docs.Use an image editing app, such as Seashore, to add a text layer over a picture, and then flatten it before inserting in the document. You can add a text box over the picture, but not text only. Its not a mac thing, Word 2008 works differently than 2003. For more 'artful text' you can use the fontwork tool, the icon which looks like a picture frame with an A inside. You can drag objects in place after you have created them. Insert your text box beside the image, not directly on top of it. To place text over a graphics image, use either of the following methods. To do this, right-click the image, click Format Picture on the shortcut menu, and then click the Layout tab.) If the In line with text option is selected, the image is inserted into the main text layer and behaves as a single character of text. Insert Text Box Over Image In Word For Mac.