Canon EOS R5 C VR Creator Kit with RF 5.2mm f/2.8 Dual Fisheye Lens - Manual (Page 715)

Registering Menu Items on My Menu Tabs
1.
Select [MY MENU*: Configure].
2.
Select [Select items to register].
3.
Register the desired items.
Select an item, then press < >.
Select [ OK ] on the confirmation screen.
You can register up to six items.
To return to the screen in step 2, press the < > button.
715