In Simulink® Project, when you create a template, it contains the structure and all the contents of the current project, enabling you to reuse scripts and other files for your standard project setup. Simulink Project does not include the contents of referenced projects in the template.
Before creating the template, create a copy of the project, and edit the copy to contain only the files you want to reuse. Use the copy as the basis for the template.
Note: If the project is under version control, see instead Create a Template from a Project Under Version Control.
On the Simulink Project tab, in the File section, select Share > Template.
On the Create Template dialog box, edit the name, add a description to help template users, then click Save As. Choose a file location and click Save.