Go to level editor and when done save level and make public
As far as I know, this is impossible to do in level editor; it is something only the producers can do.
When you are on the game, click on Level Editor and there you go!!!
All you do is type Super Mario 63 (Level editor) (Of course you will loose everything in the one that you have and you will have the level editor though but loose all saved files.) There is another way (Go and make your level you can always come back and play on the previous Super Mario 63 that has no level editor but still have Saved Files
you have to make sure you made a playground level on level editor and if you didn't you can change it by going on the level editor and go on settings.if it is a playground level press to play it and it will say set as playground. tick yes
got on the start menu and click on level editor
I think you have to make a acount first
super mario brothers
An editor in chief typically makes around 70,000 to 120,000 per year, depending on the publication and their level of experience.
This might help: http://www.brothersoft.com/map-editor-9751.html
go onto Reggie level editor on the internet
You go to Level Editor. Then, you can choose what background you want, your size, even hack the game by editing the code.