To add a new table to your interface, click the "Add" button found in the tables section of the configuration page.
If the table does not yet have a corresponding linked record field in the interface's miniExtensions source table, it will not appear in the regular table list. Add the missing table as follows:
Click "Add a missing table" towards the top of the table picker.
Select the single table you'd like to add.
Click "Add table". This creates a linked record field in the miniExtensions source table pointing to the selected table, adds that table to the interface, and opens the child-form field picker. Select the fields users can fill in or edit and finish the picker. Repeat this process to add another missing table.
Optional, but recommended: Hide the linked record field pointing to the miniExtensions table. You won't need to do anything with this field, so it's best to keep it out of sight to prevent any accidental changes. Deleting the link field or changing which table it links to can break the interface. Hiding or renaming the field alone does not remove the link.
Adding more tables depends on whether your plan supports multiple tables. See our plan limits for applicable limits on the number of child forms.