Add block to template
To add a type block from a library to a template:
Open the Templates section.
Select the folder and template where you want to add a block from the library.
The template editor appears. Go to the Blocks tab on the sidebar.
The tab contains a list of all typical Doc.one blocks. Select the block you want and drag it to the template.

The block will be added to the template at the specified location.
Editing a block from a template is not available. To edit, go to the section Blocks and change the text of the block (see details: Editing a block).