Why is there to "copy to clipboard" or "copy" button to copy each of the addresses?
Strange. Not sure what was wrong. I use the newest version and the Copy icon is on the right side of each receiving address.
I was asking why I have no copy button.
Regardless, I mananaged to find the answer from another place. It turns out there is a bug in the previous to last version of monero-gui, upgrading to the latest version will fix this problem.
So what is the version of Monero wallet you used and got problems?