How Do You Delete Characters and Stages?

[Master Shuckle]

I want to have a section screen to only have a few characters, how do I remove them from being selected? I know you can add fighters, but how do make only ten or less selectable?

Thank you in advance for the assistance.

 

[Mewtwo_2000]

For less characters on the CSS, this is your tool:

 

[Master Shuckle]

For less characters on the CSS, this is your tool:

Thank you so much you have been such a big help!