From the Finder desktop, double-click the Lexmark 3500-4500 Series folder.
Double-click the Lexmark 3500-4500 Series Center icon.
From the “What is being scanned?” menu, choose Photo.
From the “How will the scanned image be used?” pop-up menu, choose To be printed or To be viewed on monitor/web page. Photo scanning is optimized based on this selection.
Click Preview/Edit to open the Scan dialog.
From the Scan dialog, click 
to open the Scan Settings drawer.
From the Settings tab, make sure you select one of the preset scan settings appropriate for your photo.
You can also customize scan settings by adjusting color depth, resolution, and choosing a descreening option.
Select the Adjustments tab and fine-tune the scan settings.