A signature can be saved on your profile for quick retrieval during document approval:
How to add a signature to your profile
Open your profile settings and navigate to the 'Signature' section:
There are 3 options for creating a signature:
1. Typed using a signature-style font
2. Drawn using a touch screen or mouse
3. From an image
Finish by pressing [Save] to store your signature
You are now ready to use your signature during document approvals.