<span>Before GUIs became popular, the command line interface (CLI) was the most commonly used.
</span>GUI stands for Graphical User Interface . Like its name says it is a graphical interface <span>that allows interaction with users through graphical icons and visual indicators , rather than through text-based interface.</span><span>
Command line interace (CLI) is text-based interface in which </span>the user <span>issues commands to the program in the form of successive lines of text.</span>
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In media production, a key frame or keyframe is a location on a timeline which marks the beginning or end of a transition. It holds special information that defines where a transition should start or stop. The intermediate frames are interpolated over time between those definitions to create the illusion of motion.
Explanation: