How Keyframes Work
This a small dive into fonts and how to better use fonts how they work with design applications. Then learn about if you should use OTF or TTF
What are Keyframes?
Keyframes are the simple idea of 2 or more states of motion. If you want to create a simple motion on the X axis then you would create one keyframe at X 0 then for your second keyframe you would move the playhead forward in time to frame 90 then you would next set at frame 90 x to 100 to make your object move to the right 100 pixels/ 3d space/ position.
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Instead of having to manually go frame by frame for those 90 frames creative applications use tweening to do all the computing that what is set by those keyframes set from the first one to the second to the next one and so on.
What programs use keyframes?
There isn't one single program that haven't come across in the creative space that doesn't use keyframe animation(s).