Add placeholders to notifications

To add placeholders to your notifications follow these steps:

1. Enter your content in the Subject and Body fields when creating or editing a notification.
2. When you need to add a placeholder press the [ key.
3. Select the placeholder you want to use from the dropdown list, or start typing to narrow down the options.

When entering placeholders, the ':' (colon) symbol is used to indicate nesting. For example, 'program:full_name_link'.