How to fix horizontal white bar cover top or bottom screen of PDF in Adobe Acrobat DC

Adobe Acrobat DC has a horizontal white bar / box appear intermittently to cover across the top or bottom part of pdf. The covering area becomes unclickable, nothing happens when you click in any area.

Solution 1: Upgrade GPU driver

Acrobat has dependencies on the graphics driver for viewing preferences. Upgrade graphic card driver may fix this issue.

Solution 2: Update Adobe Acrobat

Check for any pending updates of Acrobat Standard DC from help > check for updates, reboot the machine after installing the updates and see if this brings any difference.

Solution 3: Repair Adobe Acrobat Installation

Repairing Acrobat once from help > repair installation, reboot the machine.

Solution 4: Reset Adobe Acrobat Preferences to Default for Windows

This solution removes custom settings for Collaboration, JavaScripts, Security, Stamps, Color Management, Auto Fill, Web Capture, and Updater.

1. Quit Acrobat.
2. In Windows Explorer, go to the Preferences folder:
   Windows 10, 7/Vista: C:\Users\[username]\AppData\Roaming\Adobe\Acrobat\[version]
XP: C:\Documents and Settings\[username]\Application Data\Adobe\Acrobat\[version]
AppData / Application Data folder is hidden by default, go to Control Panel > Folder Options > View tab > Under Advanced settings > select Show hidden files, folders, and drives, and then select OK.
3. Move the Preferences folder to another location (for example, C:\Temp).
4. Restart Acrobat.

Note: If the problem recurs after you restore the Acrobat Preferences folder, then the problem isn’t related to the Preferences folder. To restore custom settings, drag the folder you moved in step 2 back to its original location. Then click Yes to All to replace the new Preferences folder.

Solution 5: Reset Adobe Acrobat Preferences to Default for Mac OS

Restore the Acrobat preferences files to eliminate problems caused by a damaged preferences file.

1. Quit Acrobat.
2. Drag the following files from the Users/[Username]/Library/Preferences folder to the Desktop:
   • Acrobat WebCapture Cookies
   • com.adobe.Acrobat.Pro.plist or com.adobe.Acrobat.Pro_x86_9.0.plist
   • Acrobat Distiller Prefs and com.adobe.Acrobat.Pro.plist (if you are troubleshooting an issue with Distiller)
   • The Acrobat folder, which contains preferences for forms (MRUFormsList), collaboration (OfflineDocs), and color settings (AcrobatColor Settings.csf)
3. Restart Acrobat

Note: If the problem recurs after you restore the Acrobat preferences files, then the problem isn’t related to preferences files. To restore custom settings, drag the files you moved in step 2 back to their original location. Then click OK to the alert A newer item named ‘[filename]’ already exists in this location. Do you want to replace it with the older one you’re moving?

Solution 6: Reinstall Adobe Acrobat

1. Use Acrobat cleaner tool to remove Adobe Acrobat DC.
2. Reboot computer.
3. Download Pro or Standard versions of Acrobat DC, 2017, XI, or X.
4. Install Adobe Acrobat DC back.