Hi Bartosz,
Greetings
from Syncfusion support.
The File
Manager component just displays the files and folders in their layout and
doesn’t preview them. We only handled selection events at the component level.
The file-reading customizations are not integrated at the component level. We
usually use the PDF Viewer, Document Editor, and Spreadsheet
components to preview the files in the File Manager component. We have
previewed pdf, docx, txt, and xlsx files using the PDF
Viewer, DocumentEditor, and Spreadsheet components in the
below update.
https://www.syncfusion.com/forums/154689/how-to-integrate-pdfviewer-to-preview-pdf-files-on-the-file-explorer-component?reply=NqZPuM
Please let
us know if you need any further assistance.
Regards,
Indhumathy
L