Learn Swedish: Du måste trycka sitsen uppåt och sedan nedåt. - You must push the seat upward and then downward.

The suffix -åt indicates a general direction or trajectory (upward and downward) rather than a fixed destination. Using upp and ner would imply moving the seat into a final up or down position, whereas uppåt and nedåt focus on the direction of your pushing motion.

Why use sitsen here instead of sätet or stolen?

En sits refers specifically to the surface or part of a piece of furniture that you actually sit on. Ett säte is typically used for a passenger seat in a vehicle or train, and en stol is a complete, standalone chair.

Could I use skjuta instead of trycka to mean "push" in this context?

Trycka is the better choice here because it means to apply physical pressure to something, like pressing a mechanism to adjust a seat. Skjuta is used for pushing or shoving an object along a surface, like sliding a heavy box across the floor.

Is there any difference between nedåt and neråt?