Z: Click, continue
+: Replacement when Z doesn't work
X: Exit/cancel
-: Replace when X doesn't work
C: Menu, settings, save, etc.
V: View mii profileWASD/Arrow Keys: Movement
L: Rotating screen
U: Rotate OR to look through different items in shop
I: Zoom in
K: Zoom outF6 (Click twice): Confirm typing
e.g. Spelling a mii's name
— Since Z is used as both a confirm button and letter for typing out names, you would write your mii's name first, then press F6 twice to confirm the spelling. This avoids having to add 'Z' into your mii's name! After, you would press 'Z' to officially confirm the mii's name.

THANK YOU
THANK YOU
THANK YOU
If you have any further questions, you can message me on Discord or TikTok. Please keep in mind that I am a busy student, so replies may come later than expected. Nonetheless, I will still try my best to respond! Good luck to everyone using this guide. (ㅅ´ ˘ `)
Discord: @izzaronie
TikTok: @wonizt