Editora 0.18.3. Archived, so links from that release keep working. Read the 0.18.5 page →
Toggle Timeline / Calendar View
markwhen.toggleView Switch the Markwhen preview between the timeline and month-calendar renderers
How to run it
Open the command palette (M-x in the Emacs keymap) and search for Toggle Timeline / Calendar View, then press Enter. It has no default keybinding, but you can bind one in Settings → Keymaps.