Take out what should not be there
Deleting pages is usually about what you are sending, not about tidiness. A bank wants one statement, not twelve months. An employer wants the certificate, not the whole scanned folder. A form accepts three pages and you have nine.
Sending everything because separating it is fiddly means sharing more than you needed to. This makes it a few seconds' work, on your own device.
Say it the way you would say it
Type 2, 5-7 and that is what goes. Single pages, ranges, or both. Reversed ranges are read the obvious way, and anything outside the document is ignored rather than throwing an error at you mid-typing.
The numbers are positions in the file, counting from one — not the numbers printed on the pages. A report whose first page is an unnumbered cover still counts that cover as page 1 here.
Deleting is not redacting
Worth being blunt about, because getting it wrong has consequences.
Removing a page removes it completely — it is not hidden, it is gone. But that only helps if the sensitive material is confined to the pages you remove. If a name, an account number or an address also appears on a page you are keeping, deleting other pages does nothing for it.
Black rectangles drawn over text are worse still: the text is usually still in the file underneath and can be copied straight out.
Practical notes
- You cannot delete every page — the tool stops you, because an empty PDF is not a document.
- Check the result before sending, particularly if you deleted pages for privacy reasons.
- Keep your original. This produces a new file and never modifies what you dropped in.