5d button

I packed the RC Pro very tightly, and 5D button rubbed off the side of the bag and came off. How to install it back into the hole? See the attached picture. Any help is much appreciated.

I thought that Camera Forward / Down was an option one could set for the C1 and C2 buttons but it seems to me that this has now been assigned to the 5D button. Am I crazy or did DJI change the Camera Forward / Down from the C1 and C2 or 5D? Thanks.

New to drone flying. So far so good, but I would like to know how more experienced users have their programable buttons set, and why they chose those options. Thanks in advance.

I wish DJI would allow us, the user, to modify the functionality of the buttons on my RC when I use my Goggles. I liked very much having my C1 button programmed to instantly flip the camera to forward or down and this is especially useful when using the Goggles. But now that functionality has...