Hide Boot Messages
Hide boot messages on screen
Edit the /boot/cmdline.txt file:
sudo nano /boot/cmdline.txt
Make these changes:
Replace “console=tty1” with “console=tty3” to redirect boot messages to the third console?
Add “logo.nologo” to hide Raspberry logo
Add “quiet splash” for a non-text load screen.
I’m not sure how this works, but with these changes the Pi boots with a dark grey screen and three loading dots in the middle.