Step 1. First, open the PDF in Adobe Acrobat Reader DC.
Step 2. Select the “Fill and Sign” button in the right side portion.
Step 3. Then tap on the “Sign” button at the toolbar and choose “Add Signature” to include your signature to Adobe Acrobat Reader DC.
Step 4. In case you wish to include more information like checkmarks or text etc. to the document, you can use the other options on the toolbar as per your comfort.
For More Details To use in iPhone & iPad Click Below