How to Fix Cannot Change Fill and Sign Font Color in Adobe Acrobat
Question details
The user is unable to select or change the color of text and signatures when using the Fill & Sign tool.

- Product
- Adobe Acrobat
- Device & OS
- not provided
- Scenario
- Filling out forms and signing a PDF document where specific text or signature colors are required.
- Observed behavior
- The color selection controls in the Fill & Sign tool are missing, restricted, or unresponsive, preventing the user from customizing the appearance of their inputs.
Before troubleshooting, verify whether your PDF document has strict security restrictions or existing digital signatures applied, as these can lock editing features including the Fill & Sign tools.
Update Adobe Acrobat to the Latest Version
Updating your software ensures you have the latest bug fixes and full access to the newest Fill & Sign color control features.
Adobe frequently updates Acrobat to fix interface bugs and expand feature sets. Missing color palettes in the Fill & Sign tool are often resolved by moving to the latest build.
Launch the Adobe Acrobat application on your computer and ensure you are connected to the internet.
Navigate to the 'Help' menu at the top of the application window and click on 'Check for Updates'.
Follow the on-screen prompts to download and install any available updates. Once completed, restart Acrobat.
Open your PDF document, select the Fill & Sign tool, and check if the color palette icon is now visible next to the text entry box.

Change Text Color via the Properties Toolbar
If the specific Fill & Sign color picker is missing, you can force color changes using the general document properties toolbar.
Easily Fill, Sign, and Customize PDFs with WPS Office
Avoid frustrating interface limitations by using WPS Office. The built-in WPS PDF editor offers a highly intuitive Fill & Sign tool that lets you effortlessly change text and signature colors with just a few clicks.
- 1. Open your PDF: Launch WPS Office and open the PDF document you need to fill out or sign.
- 2. Access Fill & Sign: Navigate to the 'Fill & Sign' tab located on the top navigation toolbar.
- 3. Customize Your Color: Click 'Add Text' or 'Sign'. Use the prominent color picker icon on the floating menu to select your preferred font or signature color.
- 4. Apply and Save: Place your customized text or signature anywhere on the PDF, then save your finalized document.

Frequently Asked Questions
Why is the Fill & Sign tool completely grayed out in my PDF?
The Fill & Sign tool may be disabled if the document is secured with a password restricting editing, or if it is a certified document that already contains a locked digital signature. You will need the permissions password to unlock editing capabilities.
Can I change the color of a signature after I have already placed it?
If the signature has already been flattened into the PDF or saved, you cannot change its color directly. You will need to delete the existing signature block and place a new signature with the correct color selected.
Where exactly is the color picker located in Acrobat's Fill & Sign tool?
In newer versions of Adobe Acrobat, after you click the document to type text in Fill & Sign, a small floating formatting toolbar appears directly above or next to the text box. The color picker is represented by a small colored circle or an 'A' icon with a color bar underneath.




