I dig inside Site Administration - Users - Permissions - Define roles and change permissions of the Capability, it just won't work, the "customise this page" button still exists.
The Capability I change to "Prevent" or "Prohibit" list below:
my:manageblocks
tag:editblocks
user:manageownblocks
user:manageblocks
site:manageblocks
I am using Moodle 2.6.2.
Somebody help me please, thank you.
Soo Wee Chai