I have tried that and it positioned the Massage box in the middle of the page which is better than before.

Now, how do I remove the pointy section of Massage box, it looks weird that it is pointing in the wrong direction.

Btw, If you position the Massage box just above the file when a none-member clicking on, it would be a lot better. It will be much easier to reach out and click on Login or Register.

Please use the following CSS code:

#wpf-msg-box {
    top: 50%;
    right: 50%;
} 

The CSS code should be added in Top Black Admin Bar > Customize > Additional CSS, delete all caches and press Ctrl+F5 (twice) on that page and check.

Thanks, but unfortunately, it didn't work.

Btw, If you position the Massage box just above the file when a none-member clicking on, it would be a lot better. It will be much easier to reach out and click on Login or Register.

So, this specific Login/Register process is not consistent with the rest of my site, but I'll have to live with it.

Maybe in the future, you will give us a bit more control from the backend, to enable or disable this message box or maybe the ability to change the text and links as well.

Thanks and have a nice Sunday!

Please follow this support topic: https://wpforo.com/community/how-to-and-troubleshooting/where-can-i-find-and-edit-the-file-with-login-register-links-on-the-js-popup/

Thanks for getting back to me! I was asking about it because I have set up a popup login and registration and the popup is been trigger by a specific class name.

If it's not possible to change that without destroying everything else, then never mind.

I would like to change the URL links of the "Login/Register" popup.

wpForo doesn't change its own URLs, these options are only for other plugin compatibility, so if you have other pages for authorization you can use the wpForo "Custom Authorization URLs" option. In this case, the wpForo login and Registration pages will be replaced with your custom authorization pages. 

The option is located in the Dashboard > Forums >Settings > Members admin page.

More info here: https://wpforo.com/docs/root/wpforo-settings/members-settings/#custom-authorization

I would like to change the URL links of the "Login/Register" popup.

Where is the file is located?

Thanks.