...
Display optional thumbnails with a single click.
...
Use the native Confluence comments to display captions for each image:
...
Use the Image Slider macro on a page to display selected image attachments from any space or page in a nice-looking image slider.
Use attachment comments as image captions to display more information in the image slider. You can even link the images to the pages or they are attached. There are also multiple transition effects you can choose from and lots of configuration options like image fitting, responsive or static width and height, gallery mode with thumbnails, different navigation types, etc. to adjust the image slider to your needs.
...