An easy way is to add a notification or toastr widget in navigation layout of the page.
The notification widget below is pretty well documented.
But there are several others also, when you search for toastr in the appstore.
I don't know if i understand your question correctly, but their is a possibility to add (pop up) messages using microflows.
Perhaps you could try that? :)
Please Give ans this:
Use a microflow to show the message from an configurable entity and show the page.
Why is it not possible with this?
There is another way as well, which I have done it and working for a different requirement.
But first, please explain why show a message and show a page does not work for you?
if you want to show in footer, then in your layout pages, try to add a container below your main layout
You can have a dataview with microflow to retrieve the object which stores the configuration for contact address
With dataview you can show that email id
1- Add an Entity for the Admin with an attribute for the configurable text Call it (ConfigText)
2- in Admin Settings Page You Add an Data View With Data Source From You Entity Here the Amin Can Add New ConfigText
3- Admin Save the New ConfigText
4- In the Place You Want to Show Your Text You Add ListView with DataSource From Our New Entity
5- Choose First
6- Choose descending
Now You Are Ready To Go
This is included in module SystemManagement.
You can copy-paste the code or better, import that module into your application.