Adding content

[KoreSound]

Had a question, had a question on adding a sort of content like new buttons in the menu. Like in Fiesta Store section, I was wondering how to add a custom button of some sort to there. I guess it's a step to help me learn. I hope to learn so that I can add my own content in the future if need be.

Thanks
KoreSound~

[MentaL]

[Wicious]

You can't add new buttons ingame.