Yeah, so in Illustrator, as you’re adding points with the pen tool, if you hold down the Alt key, you can adjust previous line segments between 2 points… like if you’re tracing a bitmap logo and you want to make a line curve as you’re clicking along the outline without having to exit the pen tool. I call it, the “Go back and curve” feature. 
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Illustrator’s editing is decent… but when it comes to creating and manipulating splines/curves, c4d is still the most fun to work with… 
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