1. Cross hook: First tilt the pen tip to the right, then tilt it to the left, then lift it, and finally press the pen down to form a cross hook.
2. Vertical folding hook: First tilt the pen tip to the right, then tilt it to the right, then lift it up, and finally press the pen down to form a vertical folding hook.
3. Cross-folding: First tilt the pen tip to the right, then press the pen down, and finally lift it up to form cross-folding.
4. Skimming: First tilt the pen tip to the lower left, then lift it up, then tilt it to the right, then tilt it to the lower left, and finally tilt it to the right to form skimming.