I'm really sorry, but wpForo doesn't have such a feature. 

Please read this support topic. Here is discussed why it's not possible to add the feature: https://wpforo.com/community/how-to-and-troubleshooting-2/mentioning-group/#post-24650 

but that's a lot...

is there a alias like @all which is available for admin or specific user?

you should copy the mention @nickname and put in the post content. 

Thanks. Is there a way to mention all members? 🤗 

BTW: I didn't receive the email notification when you replied my topic. As I remember, there should be an email.

First of all, you haven't subscribed to this topic. 

On the other hand, I've mentioned you in post, so you should get the email notification. Probably the mail goes to the spam folder. 

yes, it's working.

Thank you so much!

BTW: I didn't receive the email notification when you replied my topic. As I remember, there should be an email.

Use the CSS code below:

#wpforo #wpforo-wrap .wpforo-content .wpf-right .wpforo-post-content a{
   color:#511fea !important;
}

The CSS code should be added in the "Custom CSS code" textarea, located in the Dashboard > Forums > Settings > Style Tab.  

The red marked code can be changed as you want. 

Please don't forget to delete all caches and press Ctrl+F5 (twice) on the frontend before checking to reload the updated CSS file.   

I tried to setup the style setting in admin panel, and the highlight 1 and 2 will both be changed if I setup new color for color #15.