<![CDATA[need help with Remove Unmarked Lines option]]>Hi,
I am facing some problem understanding the Bookmark -> “Remove Unmarked Lines” option.

The debug info from my notepad++.

Notepad++ v8.1.4 (64-bit)
Build time : Aug 21 2021 - 13:04:59
Path : C:\Program Files\Notepad++\notepad++.exe
Command Line :
Admin mode : OFF
Local Conf mode : OFF
Cloud Config : OFF
OS Name : Windows 10 Enterprise (64-bit)
OS Version : 1909
OS Build : 18363.1801
Current ANSI codepage : 1252
Plugins : LocationNavigate.dll mimeTools.dll NppConverter.dll NppExport.dll

I have 3 lines in text window, I searched for one line and marked it. Then I selected the Bookmark -> “Remove Unmarked Lines” option to remove the unmarked lines, but surprisingly all the lines were removed. Note this is an example only, I am facing same problem with a text content of production error lines which I cannot share here.

3 lines with one marked using regex ^one$
dc3b8043-e7af-4f30-bfbe-4d4d112135ad-image.png

chose option to remove unmarked lines.
5904b5f5-1e3c-426e-a7e9-d470a47682a1-image.png

All lines are removed.
68354419-ead7-43b7-8b44-97437c81d6bc-image.png

Could you please help to understand how to remove lines which are not marked?

Thanks,
Prem

]]>https://community.notepad-plus-plus.org/topic/21980/need-help-with-remove-unmarked-lines-optionRSS for NodeTue, 21 Apr 2026 20:07:09 GMTFri, 15 Oct 2021 14:48:18 GMT60<![CDATA[Reply to need help with Remove Unmarked Lines option on Fri, 15 Oct 2021 15:26:10 GMT]]>great. Thank you for the quick reply.

]]>https://community.notepad-plus-plus.org/post/70521https://community.notepad-plus-plus.org/post/70521Fri, 15 Oct 2021 15:26:10 GMT<![CDATA[Reply to need help with Remove Unmarked Lines option on Fri, 15 Oct 2021 14:59:03 GMT]]>@premkumar-bhaskal ,

You have confused “Marks” with “Bookmarks” – they are similarly named, so it’s understandable.

If you added the “Bookmark line” checkbox in the Mark Dialog, and Mark All, then it will add a circle ⚫ to the left of any lines that have a Mark (which is indicated by the change in color on the specific text); this ⚫ is the Bookmark.

a6bb13b2-bd36-4249-9f1e-d434846b2a64-image.png

After adding those Bookmarks, now Search > Bookmark > Remove Unmarked Lines will keep the one line.
c6241c42-874c-48e3-a6b7-81710b4281b5-image.png

There’s a (relatively new) section in the online usermanual that compares Bookmarks vs Marks

]]>https://community.notepad-plus-plus.org/post/70515https://community.notepad-plus-plus.org/post/70515Fri, 15 Oct 2021 14:59:03 GMT