Fujitsu fi-4220C Operator's Manual page 54

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If you save scanned documents using this procedure, the file size
may increase. For reducing the file size, please follow the procedure
below. (It may take more time than usual)
1. Select [File (F)] - |[Print (P)...].
2. On the following dialog specify [Acrobat Distiller] for [Name].
3. Press the [Properties] button.
4. Press the [Adobe PDF settings] tab.
5. Select [Conversion Settings] to [Print].
The following shows an example of [Screen].
.
6. Click [OK] when finishing setup.
7. Enter a file name and click the [Save] button on the [Save PDF
File As] dialogbox.