Thanks for the question and the example text; very helpful.
You can apply any CSS styles you like to your gallery by creating a custom style template. You can also change he HTML content with a custom markup template. You can find more information about both in the “Style and Markup Templates” section of the Settings/Media Library Assistant Documentation tab. To create the Style Template:
- Navigate to the Settings/Media Library Assistant Shortcodes tab.
- Click on the “Style” view just above the templates table.
- Hover over the “default (default)” Style entry (for the Gallery shortcode) and click the “Copy” action link.
- When the page refreshes, the “Edit Template” screen will appear.
- Change the template Name to (for example) “caption-size”.
- Make the changes you need to apply the styles you’d like. For your appplication, find the
mla_gallery-1 .gallery-caption
style at the bottom of the template and add your font-size: 10px;
style to it.
- Scroll to the bottom and click “Update” to save your template.
Once that’s done you can add the template to your shortcode with the mla_style=caption-size
parameter. Creating a custom markup template is very similar. Once your shortcode includes the new style template your caption parameter can simply be:
mla_caption='<a href="{+file_url+}" target="_blank">{+title+}</a>'
I am marking this topic resolved, but please update it if you have any problems or further questions regarding creating and applying a custom style template to your gallery.