Fix Adobe Acrobat Pro Substituting Arial Bold with Arial MT in PDFs
Question details
The user needs to prevent Adobe Acrobat Pro from automatically substituting Arial Bold with Arial MT when editing existing text in a PDF document.

- Product
- Adobe Acrobat Pro
- Device & OS
- Windows 10
- Scenario
- Editing text with specific typography within an existing PDF document.
- Observed behavior
- Acrobat automatically attempts to substitute the original Arial Bold font with Arial MT instead of retaining the intended typeface.
Ensure you have administrator privileges on your Windows 10 device, as you may need to access and modify the system Fonts folder to verify or install missing typefaces.
Verify and Reinstall Arial Bold in Windows Fonts
Ensure that the exact Arial Bold font file is properly installed and recognized by your Windows operating system to prevent Acrobat from using a fallback.
Adobe Acrobat relies on your system's locally installed fonts when editing PDF text. If the exact font variant used in the document is missing from your Windows registry, the software will automatically substitute it with the closest available match.
Press the Windows key, type 'Fonts' into the search bar, and select the Control Panel Fonts folder. Alternatively, navigate directly to C:\Windows\Fonts in File Explorer.
Use the search bar in the top right corner of the Fonts window to look for 'Arial'. Open the Arial font family group and check if the specific 'Bold' variant is actively installed.
If Arial Bold is missing, download a fresh copy from a trusted font provider or copy it from another Windows PC. Right-click the .ttf or .otf file and select 'Install for all users'.

Check Document Font Restrictions and Subsets
Verify if the PDF uses an embedded font subset that limits the characters available for editing.
Edit PDF Text and Retain Original Fonts with WPS PDF
WPS Office provides an advanced PDF editing environment that accurately identifies and retains original document fonts, preventing unwanted substitutions like Arial MT when modifying text.
- 1. Open Your PDF: Launch WPS Office, click on the 'PDF' tab on the home screen, and open your document.
- 2. Enter Edit Mode: Navigate to the 'Edit' tab located at the top toolbar and click on the 'Edit Content' button.
- 3. Modify the Text: Click directly into the text block containing the Arial Bold font and begin typing. WPS PDF will automatically detect and apply the original typography.
- 4. Save Your Changes: Once your edits are complete, click 'File' and select 'Save' to preserve the updated text with the correct formatting.

Frequently Asked Questions
Why does Adobe Acrobat substitute fonts when editing PDFs?
Acrobat substitutes fonts when the exact font used in the original document is either not installed on your local computer, is restricted by licensing, or was embedded as a subset that lacks the specific characters you are attempting to type.
What does 'Embedded Subset' mean in a PDF document?
An embedded subset means only the specific characters used in the original document were saved within the file to reduce file size. If you try to type a letter that wasn't in the original text, the PDF editor cannot use that font and will substitute it with a system default.
How do I ensure fonts are completely embedded when creating a PDF?
When exporting to PDF from applications like Microsoft Word, open the PDF export 'Options' or 'Preferences'. Ensure that 'Embed fonts in the file' is checked and that any setting titled 'Subset embedded fonts when percentage of characters used is less than' is disabled.




