1. Open the PDF document and select Sign from the top tools bar. Alternatively, from the All tools menu, select Fill & Sign.

2. Create your signature and initials if not already done. To do so:

• From the Quick actions toolbar, select  
• To add a signature, select Add signature. In the dialog that appears, type or draw your signature and then select Done.
• To add your initials, select Add initials. In the dialog that appears, type or draw your initials and then select Done.

3. From the Sign panel, select your signature, move over to the field where you want to add it, and then click to place the signature. Or, from the Quick actions toolbar, select    and then select your signature.

4. The form fields are detected automatically. Hover the mouse over a field to display a blue box. Click anywhere in the blue box, the cursor will be placed at the right position automatically. Type your text to fill the field. 

5. If you've already added your signature or initials, just select it from the Sign options, and then click at the place in the PDF where you want to add your signature. Skip to the next step.

If you are signing for the first time, you see the Signature or Initials panel. Below is an example of the Signature panel.

6. To move the placed signature or initial, select the field to highlight it and then use the arrow keys. To resize or delete the field, use the options in the field toolbar.