Fix Missing Add Signature Button in Acrobat Fill and Sign
Question details
The user is unable to add a new signature in Adobe Acrobat because the Add Signature button is missing from the Fill & Sign toolbar.

- Product
- Adobe Acrobat
- Device & OS
- not provided
- Scenario
- Trying to digitally sign a PDF document using the Fill & Sign tool.
- Observed behavior
- The Add Signature option disappears from the toolbar when the maximum number of predefined signatures has been reached.
Ensure your document is properly saved before making changes to your signature profile. Acrobat limits the number of saved signatures, so you will need to manage your existing list.
Delete an Existing Saved Signature
Since Acrobat limits the number of saved predefined signatures, removing an old one will free up a slot and restore the Add Signature button.
Adobe Acrobat Fill & Sign typically allows you to save only two signature types: one full signature and one initial. Once these slots are occupied, the option to add a new signature automatically hides itself.
Launch Adobe Acrobat, open your PDF document, and select the Fill & Sign tool from the right-hand pane.
Click on the 'Sign' icon (which looks like a pen nib) located in the top toolbar to view your currently saved signatures.
Hover over one of the existing signatures and click the minus (-) icon or the 'Delete' button next to it.
Close and reopen the Fill & Sign tool. Click the 'Sign' icon again, and you should now see the 'Add Signature' button available.

Easily Sign PDFs with WPS Office
If you frequently encounter limitations with PDF signing tools, try WPS Office. Its built-in PDF editor offers a straightforward, unrestricted way to create, insert, and manage multiple digital signatures safely and efficiently.
- 1. Open your PDF: Launch WPS Office and open the PDF document you need to sign.
- 2. Navigate to the Sign tool: Go to the 'Insert' or 'Protect' tab on the top ribbon and click on the 'Sign' button.
- 3. Create a signature: Select 'Create Signature' from the drop-down menu. You can choose to type your name, draw it with your mouse, or upload an image of your physical signature.
- 4. Apply to document: Click 'OK' and place the signature anywhere on the PDF page. You can drag the corners to adjust its size.
- 5. Save changes: Press Ctrl + S or go to Menu > Save to finalize your signed PDF securely.

Frequently Asked Questions
Why does the Add Signature button disappear in Acrobat?
The button usually disappears because you have reached the maximum allowed limit of saved signatures in your Acrobat profile. The software restricts you to one saved signature and one set of initials.
How many signatures can I save in Acrobat Fill & Sign?
Acrobat typically allows you to save exactly two predefined signature items: one full signature and one initial.
Can I add a new signature without deleting my old ones?
In Acrobat, if your saved slots are full, you must delete an existing signature. Alternatively, you can use a different PDF editing tool like WPS Office, which provides more flexibility for managing multiple signatures.
Are signatures added in WPS Office valid when viewed in Adobe Acrobat?
Yes, signatures applied and saved onto PDFs using WPS Office are flattened into standard PDF formatting, making them fully compatible and visible when the file is opened in Adobe Acrobat or any standard PDF reader.




