Pre-requisites:
Permission as mentioned below, on the project template in which a subfolder is to be created:
To manage the project template, 'Admin' permission must be assigned to you, your organization, or a user group in which you are a member.
Below are the steps to create a subfolder in a project template:
1. In the 'Files' area, navigate to the required project template from the folder tree on the left side.
2. Right-click on the folder under which a subfolder needs to be created, select 'New' then select 'Sub Folder'.
3. Follow the steps required to create a subfolder on a project (See steps 3 to 10).
Next Article: Edit a Folder (in a Project Template)