Overview
Throughout this document I use the terms “reusable block”, “block template”, and “disclaimer template” interchangeably. WordPress provides us with Reusable Blocks, in the form of block templates, that we can use to create reusable Disclaimer templates.
Block Templates can be managed just like pages or posts. The Reusable Block page is where the templates are created and updated. Once a block template is created, it can be used in any location that supports them.
One of the cool features of these reusable blocks is that when the master template is updated, all implementations automatically inherit the changes applied. So, update the original and that immediately filters down to all blocks using the template.
Templates support basic formatting such as bold, italics, links, etc. Templates can also contain multiple text elements such as paragraph, images, and headings.
Last thing to mention is that you can leverage the convenience of a template, but “disconnect” it from the original. This is best demonstrated by an example. Say you want to insert the “Stocks and Shares ISA” template, but need to insert an additional sentence into the default text. With a single click you can “disconnect” the block from it’s template, allowing you the benefit of the full boilerplate but the flexibility to then edit the text as needed after insertion. This is a long way of saying that you can get the full template text but still be able to edit a single instance when the situation calls for it.
Creating New Disclaimer Templates
Navigate to the Reusable Block page. Click “Add New”. Give the block template a title. Enter the template text. Done. This block is now available on all content that supports it.
Updating Disclaimer Templates
Navigate to the Reusable Block page. Click “Edit” on any of the existing templates listed. Any changes made will immediately be applied to all blocks inheriting the template.
More Information
This was a quick overview. A more in depth article (with images and video) can be found in this great post in the official WordPress documentation.