Generally invisible to the user, like you can't see it on your OS or in just a standard application
Answer: i think 1, 3, and 4
Explanation:
Answer: A keyframe is a location on a timeline which marks the beginning or end of a transition. So for example, you have a movie and it transitions to another scene, keyframes tell it when and where to start the transition then when and where to stop the transition.
Answer:
I've seen these a lot. What happens when you click on them tho?
Explanation:
Answer:
Because you might have some characters that look very similar but at not so that's why it says that your password is wrong.
Explanation:
