AFAIk its not possible to add column on a page. But you can use OEM BI reports to create your own reports.
Oracle Database Tablespace Daily Space Usage
As a part of previous ER implementation , Starting from 12c Maximum File Size (MB) was added to the View Tablespace page i.e when you click on individual Tablespace link it shows the following for the individual Tablespace
Name Directory Size (MB) Used (MB) Maximum File Size (MB) Auto Extend
If you think adding Maximum File Size (MB) column to the Main Tablespaces page itself is indeed a desired helpful product feature then you can open an SR with Oracle Support providing Business and Technical justification for same and we can then raise an Enhancement request with Dev team to evaluate the possibility of including this feature for future releases
Rahul, you wrote that the View Tablespace page, "shows the following for the individual tablespace", but that is not what it does. It shows the columns you listed for individual datafiles. I think is is good that that information is shown, but what I want is a sum of the maximum file size for all datafiles of a tablespace. That way I could see at a glance how much has been used and how big the tablespace can grow. I know the Tablespaces page has column Available Space Used (%), which is related to what I want, but I just want a plain number. Tell me how big the tablespace is now, and how big it can grow. Better yet, give Console users the choice between Available Space Used or Maximum Tablespace Size. I will look into the BI reports that TSharma described, and will consider filing the SR you mentioned.
Thanks for your update
Regarding your query the answer is No, in current versions we cannot add a column to the page that displays information on the Tablespaces of a database
But if you want we can raise an Enhancement request for the same so Dev team can evaluate the possibility of including this feature for future releases