Hello You can mark any count of lines with bookmarks. In the Search dialog you can use search and mark lines with "Create bookmarks" button In the menu Search (in bookmark section) is possibility to delete marked lines
You are right, copy possibility of marked lines is missing now. I will add it. If you need it just now, you can use PSPad scripting capabilities and write simple script what will do this job for you -- <https://forum.pspad.com/read.php?2,78572,78574> PSPad freeware editor https://www.pspad.com