# Comments on the PDF

> Select text in the PDF to comment, reply in threads, mark resolved, close, and carry comments over to a new version.

Comments are attached to an exact passage in the PDF of a version, with a reply thread and a resolution status. Every action is written to the audit log.

## Write a comment

1. Open the [work page](/en/huong-dan/trang-cong-trinh/), the **Tài liệu** (Documents) tab, **PDF** mode, **Nhận xét** (Comments) panel.
2. Select a passage in the PDF. The quote appears in the right-hand panel.
3. Type into **Viết nhận xét…** (Write a comment…) and click **Thêm nhận xét** (Add comment).

![A selected passage and the Write a comment box](../../../../assets/shots/nhan-xet-viet.webp)

A highlight box appears on the PDF page; click a comment in the list to scroll to and flash its passage. The work header shows **1 nhận xét đang mở** (1 open comment) in the To do row.

![An open comment: quote, text, reply box and the Mark resolved button](../../../../assets/shots/nhan-xet.webp)

## Reply, resolve, close

| Action | Who can do it |
| --- | --- |
| **Trả lời** (Reply; the Trả lời… box → **Gửi**/Send) | Members of the work |
| **Đánh dấu đã xử lý** (Mark resolved) | Members of the work, while the comment is open |
| **Đóng** (Close) | Only the comment's author, and only after it is resolved |

On a phone you can read comments and mark them resolved.

## Carry over to a new version

When you open a new version, comments that are not closed are matched again by their quote. If the quote cannot be found, the comment stays as **Chưa định vị** (Not located): it is still visible in the list, and the system does not guess a position.