Decide what the watermark is meant to say
A review watermark is a version label, not a security control. It can make it obvious that a file is a draft, an internal copy, or material supplied for comment. It cannot stop a recipient from forwarding, photographing, or copying the file. Start by making a separate review copy and leave the source document unchanged. That gives you a clean restart if the mark is too strong or the wrong pages were included.
For example, a consultant sending a proposal for client comments might use DRAFT, FOR REVIEW, or a project code. A short label is easier to read at an angle and is less likely to cover a heading or a table cell. Avoid a long warning sentence. If two groups need different instructions, make two deliberate copies instead of layering several messages over one page.
Apply a restrained text watermark
Use the PDF Watermark tool to choose a PDF, enter the watermark text, and set its font size and opacity. The tool adds the same text to every page and produces a new PDF in the browser. Begin with a moderate size and low opacity. Then judge the result on the busiest page, not on an empty cover page.
The current embedded font supports common Latin characters. If you enter CJK or other unsupported characters, the tool reports that limitation instead of silently substituting text. Choose a short Latin label, number, or project code where that fits the review process. The tool cannot detect a signature box, a dense spreadsheet, or a dark scan; it only places the text. Readability is therefore a human decision.
A useful rule is simple: the watermark should be visible at normal zoom while the document's text, dates, and values remain easy to read. If it competes with the body copy, lower the opacity before shrinking the text to an unreadable size. If it disappears on a dark scanned page, make a separate review copy with settings suited to that material rather than assuming one setting works for every document.
Set the review scope before marking pages
Do not use a watermark to compensate for an overbroad attachment. If a reviewer needs only selected pages, create that selected copy first with the PDF Page Manager. It can prepare a PDF by keeping, removing, rotating, or reordering pages, but it cannot decide which evidence, appendix, or personal detail may be shared.
For instance, suppose pages 4 through 11 of a twenty-page proposal need design feedback while the remaining pages contain internal pricing. Prepare the eight-page review copy, check its page order, and only then watermark it. This removes the sensitive pages from the working file instead of relying on a visual label to make them safe.
If several confirmed review files belong in one packet, use PDF Merge after each one has passed its own readability check. Merging follows the file order you provide; it does not identify missing attachments or fix page order inside a source PDF. Check the joins and the final order after combining files.
Verify the downloaded copy before you share it
Open the downloaded PDF, not merely the preview you had in mind while setting it up. Move from the first page to the last and check that the watermark is present, the page count matches the intended review scope, and the main text remains legible. Pay special attention to landscape pages, dark scans, compact tables, and pages with figures or signature areas.
Also check the filename and recipient separately. A good-looking mark does not validate the destination, protect personal information, or meet an organization's contractual or regulatory requirements. For confidential, employment, health, legal, or financial material, verify the official process or seek appropriate professional advice before sharing. The final check should answer two questions: is this the correct review copy, and can its intended recipient read it without losing the meaning of the document?
FAQ
Does the tool change my original PDF?
No. It generates a new watermarked PDF for download. Keep the original until the review copy has been checked and accepted.
Can I watermark only certain pages?
The watermark is applied to every page in the uploaded file. Create a selected-page copy first if only part of the document should be reviewed.
Why does the watermark cover a table on one page?
Pages can have different sizes, orientations, and content density. Lower the opacity or size, regenerate the copy, and inspect every page rather than relying on the cover page.
Is a watermark enough to keep a PDF confidential?
No. It labels a version but does not control access or forwarding. Confirm the recipient, sharing method, and your organization's rules separately.