Add captions to your Image Tiles or Thumbnail Images to make them more informative for your audience. These caption's font size can be adjusted by following the steps below:
1. In Site Editor, click on the Image Tile
2. On the left panel, you can use the font size slider to increase or decrease the font size of the caption. Dragging it left will decrease the font size, and dragging it right will increase it.
3. You can also specify the value in the box beside the font size adjuster.
4. Once done, click on Done Editing Tile.