fullscreen()
Toggles full-screen mode. Calling fullscreen() makes the sketch full-screen or if already set fullscreen it returns to its original size.
Examples

function setup()
background(200)
describe('A gray canvas that switches between default and full-screen display when clicked.')
end
-- If the mouse is pressed,
-- toggle full-screen mode.
function mousePressed()
fullscreen()
end
Syntax
fullscreen()