Epson Perfection V500 - Manual (Page 163)

Select the settings that match your document. If you want to create a searchable PDF,
make sure Create searchable PDF is selected in the Text tab (for details on selecting
settings and other PDF options, click the Help button). When you are finished selecting
settings, click OK. You return to the File Save Settings window.
When you are finished selecting file settings, click OK. Epson Scan scans your page and
displays this window.