import React, { useState } from 'react';

const CustomSigningInstructions = () => {
  const [customInstructions, setCustomInstructions] = useState('');

  const handleCustomInstructionsChange = (e: React.ChangeEvent<HTMLInputElement>) => {
    setCustomInstructions(e.target.value);
  };

  const handleSaveCustomInstructions = () => {
    // save custom instructions
  };

  return (
    <div>
      <button onClick={handleSaveCustomInstructions}>Add Custom Instructions</button>
      <input type="text" value={customInstructions} onChange={handleCustomInstructionsChange} />
      <p>{customInstructions}</p>
    </div>
  );
};
```