With the Adobe Acrobat PDF Optimizer, you can reduce the file size of a PDF in a number of ways. For example, you can compress images, flatten PDF layers, remove document data and unembed fonts. When a font is embedded in a PDF, the exact font formatting is always used in the PDF. When you remove an embedded font, a substitute font is used for the PDF if the font is not installed on a computer on which the PDF is viewed. You can remove embedded font for Roman text and East Asian text.
Unembed Fonts
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Step 1
Open the PDF in Adobe Acrobat, click "Advanced" and choose "PDF Optimizer."
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Step 2
Click the "Fonts" check box in the left pane.
Step 3
Select the font you want to remove from the "Embedded fonts" pane. You can select multiple fonts by pressing down the "Ctrl" key as you select multiple fonts.
Step 4
Click "Unembed" and click "OK."
Step 5
Provide a name for the file, select where you want to save the file and click "Save."