How to create a template from the whole canvas:
Without any objects selected, click Save as template in the design bar
Alternatively, go to the File menu and choose Save as template.
How to create a template from selected objects:
Select the specific objects you want to include in your template.
Click Save as template in the design bar.
The Template Dialog:
In both cases, the template dialog will appear, allowing you to customize the following properties:
Template name: The title that will be used for new canvases created from this template.
Description: A description of the template's purpose and contents.
Project / workspace: Choose whether the template should be available within the current project or across the entire workspace.
Select preview area: Define a specific area of the template to be used for thumbnail generation.
Upload image: Upload a custom image to be used as the template's thumbnail.
You can modify these properties later after the template has been created.