You can fill in the form fields in the PDF file and submit, print, or download the form after you have filled it out. If you have corresponding access rights, you can switch to editing by clicking the Edit PDF button on the top toolbar.

If you are using the server version of ONLYOFFICE Docs, the presence of the Submit button depends on the configuration. When there is no configuration for submitting a form, the button will be displayed as Save as. Read this article to learn more.
In the desktop editors, the
Save as button is displayed instead of the
Submit button.
You can also use the Print button to print the form, or switch to the File tab and download the form in one of the supported format.