You are required to have administraton rights in the project to do this.
First, create a display template if it doesn’t already exist. This is described in ”How do I create a personal display template”. Be sure to give the template a descriptive name.
Then do the following:
1) Click on the “REPORT TEMPLATES” link at the bottom of the left menu and locate the template you want to add to the project.
2) Make the template global if it isn’t already by editing the value in the ”Global” column
3) Go back to the project and click on the link Report Templates (for the project) in the left menu and then “Add templates to the project” and choose the template you want to add.