Select asset tiles like images, video, file, etc, and certain asset render, like when an image tile is expanded, allows captions to be added for it.
To add a caption:
1. Click the tile.
2. Type the caption in the Caption text editor.
3. Style the caption as preferred, based on the available options in the text editor.
Note: Pasting caption from another application might include an HTML design or format which could overwrite the site - or theme - level designs or customizations. This causes inconsistencies with the design of the caption when rendered, such as with its line height, spaces and gaps between lines, etc. To prevent these inconsistencies, copy the captions as texts only. This feature on most browsers is found under the Edit menu.