To add, change, or delete a PDF file displayed in the PDF Viewer, you must load a changed PDF file list (PDFFileList.csv) in offline mode in addition to updating the PDFs stored in external storage.
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For the PDF file list, refer to the following.
M.17.8.2 Importing/Exporting PDF File List
For details about the setting screen, refer to the setting guide.
M.17.8.4 External File Operation - Load PDF File List

Store the PDF file list (PDFFileList.csv) in the PDF folder directly under the external storage.
Enter offline mode and touch [External file operation] in the item changeover buttons.
[External file operation] screen opens. Touch [Load PDF File List].
Select the external storage where the backup file is saved, and touch [Start].
When the PDF file list has finished loading, the following dialog box appears.
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The following dialog box appears if the PDF file list could not be loaded because the file was not found or the file format was invalid.