How to copy DKIM rsa.public key content

1. What is the problem? Be very detailed.
I am trying to configure DKIM. I am able to generate rsa.public . Now i need to copy content to add a TXT record in my domain. how to do that
2. What app or server are you using and on what device and operating system? Include version numbers.
ODK Central

What have you tried so far to figure out how to add a text record to your domain?

I tried the given command ( Ctrl+6: to mark text and Ctrl+^ to copy text) help but i am unable to paste the text to notepad. As i need to copy rs.public key content into my domain cpanel to add TXT RECORD. Do i missing something
I am following steps to configure

It sounds like the issue here is that you can't copy and paste the text from DigitalOcean's console? That's a DigitalOcean issue, so please ask their support for help.

My recommendation is to use a native SSH client where you can more easily copy and paste. If you are on Windows, use PuTTY. If you aren't, use OpenSSH