Overview of the existing templates can be found in the right pane of Edit mode (Templates tab). Templates can be organized in separate folders.
Editors can create new templates which they can later reuse for creating new pages or blocks from that template.
New option is added to templates folder context menu where editor can choose template type (page template or block template).
In central pane editor can choose template name and content type for the template.
Editor need to fill data for template and publish template. Newly created template will be displayed in template overview section.
Open context menu of parent page and select menu option "New from template".
The New From Template command displays available templates to the editor (only showing the allowed templates for that editor).
After creating template instance it will be visible in page hierarchy. Template instance contains pre-filled data from template and editor can change data before publishing the page/block