Editora 0.11.0. Archived, so links from that release keep working. Read the 0.18.5 page →
Edit: Reverse Lines
edit.reverseLines Reverse the order of the selected lines (or the whole file).
How to run it
Open the command palette (M-x in the Emacs keymap) and search for Edit: Reverse Lines, then press Enter. It has no default keybinding, but you can bind one in Settings → Keymaps.