Hi Rahul, 🙂
The SiteWide notices of BuddyPress allows you to send messages to users. For more about this, please click on the following link:
In the case you want to add a specific text visible by all users, we suggest you to use a Text Widget.
Thank you for bring this other issue to our attention. We’re glad to answer any question related with the setup of our theme.
However, it is very difficult for us to provide the best support possible and to keep track of issues and their resolution if so many questions are asked in the same topic.
Moreover, it’s easier for us to share the resolution for a single issue with other members of our community facing the same problem.
So, could you move your other question into a different topic, please? One question = one topic.
By doing this, you will be making a great contribution to this forum, and we thank you very much for that! 🙂