Editora 0.9.10. Archived, so links from that release keep working. Read the 0.18.5 page →
Edit: Lowercase Region
edit.downcaseRegion Lowercase the selected text.
How to run it
Open the command palette (M-x in the Emacs keymap) and search for Edit: Lowercase Region, then press Enter. It also has a default keybinding:
| Emacs | C-xC-l |