There’s sliders for both, plus some presets in another sub-menu. It’s reasonably comprehensive, except for sometime last year when they “updated” (read enshittified) the app by letting A.I. decide what element of an image it assumes I want to make into a sticker. Instead, now I have to crop out an object, go to a separate app (sketchbook), layer stuff, save that, then go back to gallery for any simple text or resizing. Really slowed down my posting reaction time.