Review, mark up and sign anywhere.

What is PDF annotation?

PDF annotation adds a review layer over a document. Highlights, notes, drawing and markup can call attention to a clause, answer a question or show where a revision is needed while leaving the underlying page intact.

Annotations are helpful for contracts, proofs, lesson materials, reports and team reviews. Use them deliberately: a few precise comments are easier to act on than a page covered in unexplained marks.

How to review and sign a PDF clearly

Read the full document before signing. Confirm names, dates, amounts and attachments, then place the signature only in the intended field. If the workflow requires initials or a date, complete those fields consistently.

Save a separate signed copy and open it again to make sure the signature and annotations appear correctly. Send the signed PDF through the channel requested by the recipient.

• Use highlights for short, specific passages
• Add comments that explain the requested action
• Choose a contrasting but readable markup color
• Review every page before adding a signature
• Keep an unmarked original and a signed final copy

Electronic signatures and document intent

A drawn or stored signature can make routine approvals far more convenient, but signature requirements vary by document, organization and jurisdiction. Confirm whether the recipient accepts an electronic signature and whether additional identity verification is required.

Do Scan provides annotation and signature tools rather than full PDF text editing. This keeps the experience focused on reviewing, marking up and completing documents from your phone.

Prepare the page sequence before annotating a copy

Extract the relevant pages or split a packet into sections before adding your notes and signature. Use page numbers to make review comments easier to reference, and a DRAFT or COPY watermark when the document’s status needs to be visible. The layout tool can reverse pages or insert a blank divider.

Check the completed document before sharing. A visible annotation, drawn signature or watermark does not provide the certificate-based verification of a digital signature. Preserve originals when preparing a new review copy.

• Extract selected PDF pages
• Split a PDF into separate files
• Add page numbers
• Add a text watermark

Keep everyday document work close with the Do Scan app

Use the free web tools for the file in front of you. When paperwork is a regular part of your day, the Do Scan app brings scanning, offline OCR and PDF management together on your phone. Capture a new paper document, recognize its text and keep your document workflow on your device.

Get Do Scan from the App Store for iPhone and iPad or from Google Play for Android using the links below. Explore the app features to decide whether its on-device workflow suits your receipts, notes, forms and recurring document tasks. The free web tools remain available without an app install or account.