Hello.

Have a question. How can I add random WYSIWYG block on forum? 

I have just guest singup widget. How can I use block with random message, button, picture for every users on forum. Not only for guests?

Ask the file owner if he could update it.

 

Check this out:

 

Alternatively, if you own the pages application, you can do this in the core platform

 

Check this out:

 

Thanks. Looks good