You know that pressing Command-D (PC: Control-D) after transforming an object will apply the transformation again. However, did you know that you can do the same thing to an anchor point? Just select the Direct Selection tool (A) and move a single anchor point on the object. Here's the tip, though: You won't be able to press Command-D (PC: Control-D) to redo that transformation/move. You'll need to manually go through the Object menu under Transform>Transform Again to do this because pressing the Command key (PC: Control key) reverts the tool back to the Selection tool (V).
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