LibreOffice 7.2 Help
Choose the selection mode from the submenu: normal selection mode, or block selection mode.
བརྡ་བཀོད་འདི་འཛུལ་སྤྱོད་འབད་ནི་ལུ...
D'oh! You found a bug (text/swriter/00/00000402.xhp#selection_mode not found).
In normal selection mode, you can select multi-line text including the line ends.
In block selection mode, you can select a rectangular block of text.