## Background

If a document’s fonts are missing from the system used to create the PDF, the results are unpredictable. In general, there’s always some change in appearance, especially when inappropriate fonts are substituted for missing fonts.

## Purpose

If the original document’s fonts are not available, CommonLook Office prompts the user to set appropriate substitute fonts before creating the PDF document.

Note that any font substitution has the potential to significantly change the appearance of the document. In general, font substitution should be avoided. The easiest way to avoid font substitution problems is to create the PDF files on the same computer used to author the document.

## Instructions

1. Click on the Show Font Substitutions button to display the Font Substitution dialog.
2. Install the missing document fonts, close and re-open the document.
3. Alternatively, confirm that the substituted font is appropriate and Click Convert Permanently