How to power on on HHKB Professional Hybrid?

Hold Power button 2s. Wakes the keyboard from sleep. LED briefly flashes to confirm.

How to switch to mac mode on HHKB Professional Hybrid?

Fn + Ctrl + M. Switches to macOS layout. Command and Option keys will be properly mapped. Can also be set via DIP switches (SW1=OFF, SW2=ON).

Fn + Q. Enters BT pairing standby. LED blinks blue, discoverable for 60s. Press Fn + X to cancel.

Fn + 1–9, 0, -, =. Number row doubles as F1–F12 through Fn layer. Fn+1=F1, Fn+2=F2, ... Fn+0=F10, Fn+-=F11, Fn+= =F12.

Name: HHKB Professional Hybrid
Brand: HHKB

Power On: Hold Power button 2s — Wakes the keyboard from sleep. LED briefly flashes to confirm.
Power Off: Hold Power button 3s — Powers off the keyboard. Amber LED confirms shutdown.

Switch to Mac Mode: Fn + Ctrl + M — Switches to macOS layout. Command and Option keys will be properly mapped. Can also be set via DIP switches (SW1=OFF, SW2=ON).
Switch to Windows Mode: Fn + Ctrl + W — Switches to Windows/Linux layout. Win and Alt keys in standard positions.

Enter Pairing Mode: Fn + Q — Enters BT pairing standby. LED blinks blue, discoverable for 60s. Press Fn + X to cancel.
Switch Device (Slot 1–4): Fn + Ctrl + 1/2/3/4 — Connects to BT device in slot 1–4. If no device is paired to that slot, enters pairing mode.
Switch to USB: Fn + Ctrl + 0 — Switches from Bluetooth to wired USB-C connection.
Clear All Pairings: Fn + Q → Fn + Z + Delete — Deletes all saved BT pairings. First enter pairing mode (Fn+Q), then press Fn + Z + Delete.

F1–F12: Fn + 1–9, 0, -, = — Number row doubles as F1–F12 through Fn layer. Fn+1=F1, Fn+2=F2, ... Fn+0=F10, Fn+-=F11, Fn+= =F12.
Arrow Keys: Fn + ; ' [ / — Fn+[ = Up, Fn+/ = Down, Fn+; = Left, Fn+' = Right. These are printed on the keycaps.
Home / End / PgUp / PgDn: Fn + K , L . — Fn+K = Home, Fn+, = End, Fn+L = Page Up, Fn+. = Page Down.
Volume & Mute: Fn + A / S / D — Fn+A = Volume Down, Fn+S = Volume Up, Fn+D = Mute.
Caps Lock: Fn + Tab — Toggles Caps Lock. HHKB omits a dedicated Caps Lock key to keep the 60% form factor.
Insert / Forward Delete: Fn + \ / Fn + ` — Fn+\ = Insert, Fn+` = Forward Delete. Physical Delete key acts as Backspace by default (changeable via DIP SW3).