By setting a default Quality Profile, you assign every project without a specific Quality Profile to use the default one.
To assign Quality Profiles to specific Projects, use the Project Settings > Quality Profiles menu for your project and select the one you would like to use.
Quality Profiles
On the Quality Profiles page, under Actions, select the 'Change Profile' option.
Change Profile
Under the specific Quality Profile selection dropdown, choose the Quality Profile you want to use for the scans.
