Thanks for your question.
There is no feature in the MLA core to support this, but you can install one of the example plugins to get what you need to accomplish your goal.
Navigate to the Settings/Media library Assistant Documentation tab and click the “Example Plugins” button. Type “substitution” in the text box and click “Search Plugins” to filter the table.
You are looking for the “MLA Substitution Parameter Hooks Example” plugin. Find that plugin and hover over the title in the left-most column. Click the “Install” rollover action, then go to the WordPress Plugins/Installed Plugins submenu and activate the example plugin as you would any other plugin.
Once the example plugin is installed and active you can use the {+page:featured+} data source to compose your gallery, e.g.:
[mla_gallery ids="{+page:featured+}"]
I am marking this topic resolved, but please update it if you have any problems or further questions regarding the solution outlined above. Thanks for your continued interest in the plugin.
