Fix Signature Option Missing in Adobe Acrobat Mobile App
Question details
The user needs to restore the signature option that has disappeared from their mobile application to sign a PDF document.
- Product
- Adobe Acrobat Mobile App
- Device & OS
- not provided
- Scenario
- Attempting to insert a signature into a PDF document using a mobile device.
- Observed behavior
- The option to add or insert a signature is completely missing from the application interface, preventing the user from signing the file.
Before troubleshooting the app, confirm that the specific PDF document you are trying to sign is not encrypted, password-protected, or restricted from editing by its author.
Update App, OS, and Verify Account Permissions
Updating your mobile operating system and the app to the latest versions often resolves missing interface features and bugs.
Software updates often contain essential bug fixes for missing UI elements. Additionally, some premium features in Adobe Acrobat may disappear if the app fails to authenticate your account subscription.
Open your device's App Store (iOS) or Google Play Store (Android), search for 'Adobe Acrobat', and tap the 'Update' button if a new version is available.
Navigate to your device's Settings, locate the 'Software Update' or 'System Update' section, and install any pending OS updates.
Launch the Adobe Acrobat app, tap the profile icon in the top corner, and ensure you are actively signed in to the Adobe account associated with your subscription.
Open the PDF, tap the three-dot menu, and view the document properties or security settings to ensure 'Signing' is listed as an 'Allowed' action.
Reinstall the Mobile Application
Reinstalling clears out corrupted cache data or broken application files that might be hiding the signature tool.
Sign PDFs Effortlessly on Mobile with WPS Office
If your current PDF app is glitching or restricting features behind a paywall, WPS Office offers a powerful, lightweight, and completely free alternative to read, edit, and sign PDF documents directly from your smartphone or tablet.
Frequently Asked Questions
Why is the Fill & Sign option grayed out on my PDF?
This typically occurs when the author of the PDF has applied security settings that restrict editing, commenting, or signing. You will need the document password to unlock it, or you must request an unrestricted copy from the sender.
Do I need a paid subscription to sign a PDF on my phone?
Not necessarily. While some apps lock advanced signature features behind subscriptions, you can use free alternatives like WPS Office to draw and insert basic electronic signatures into your PDFs at no cost.
Where are my saved signatures stored after an app update?
Saved signatures are usually stored in your app's local cache or synced to your cloud account profile. If you reinstall the app or log out, you may need to recreate and save your signature again.
