MSI B450M-A PRO MAX II Micro-ATX Motherboard - Manual (Page 6)

4
Case stand-off notification
To prevent damage to the motherboard, any unnecessary mounting stand-off between
the motherboard circuits and the computer case is prohibited. The Case standoff keep
out zone signs will be marked on the backside of motherboard (as shown below) to
serve as a warning to user.
Avoid collision notification
Protective paint is printed around each screw hole to prevent parts from being
scratched.
* The illustration above is for reference only and may vary from the motherboard you
purchased.