3 steps

1. STEP 1 · PLACE ANCHORSClick points · a live line follows, red guides call out alignments. Click the first point (it rings) or press ⏎ to close the loop.
2. STEP 2 · SCULPT THE LOOPThe closed loop stays editable: drag points, drag anywhere ON the line and the curve bends under the hand (a plain click still adds a point), ⌥click removes, ⇧click flips corner ⇄ curve. The selection follows every move.
3. STEP 3 · KEEP IT⤓ saves the path and ▤ brings it back anywhere · flow type along it, fill it as a shape, or lay it down as a guide · ⤺ Continue picks any saved path back up at its end to keep drawing.

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