F full screen (in-window when the browser refuses)
G guides + snap (a 16px dot grid · drags, resizes and connector ends snap to this slide's layout lines)
⌘C · ⌘V copy · paste slides (in the sheet)
Rows
click select · ⌘ · ⇧ add to the selection
drag move · corner handle resizes · a connector's point handles move one end · empty canvas = marquee (⇧ adds)
↑ ↓ ← → nudge 1px · ⇧ 10px
double-click edit text · select text → roles · B I U S̶ · link · color
⌘B · ⌘I · ⌘U bold · italic · underline (a selected row takes it whole)
⌫ delete · ⌘Z undo
⌘ click a link opens in a new tab (presenting: a plain click · hover a link for its hint)
File
⌘S save the file (asks for it once · Safari: downloads a copy)
Buttons only: add · duplicate · spellcheck · versions · PDF. Spellcheck underlines the words the build's dictionary refused, on every slide; the browser's own checker adds the row you type in. Never present, print or PDF.