Fujitsu fi-4220C2 Operator's Manual page 56

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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] - |[Print...].
2. On the following dialog specify [Adobe PDF] for [Name].
3. Click the [Properties] button.
4. Click the [Adobe PDF settings] tab.
5. Select one from [Default Settings].
The following shows an example of [Standard].
.
6. Click [OK] button.
7. Enter a file name and click the [Save] button on the [Save PDF
File As] dialogbox.