Rename columns of imported tables

Rename columns of imported tables

I have tables that are imported via the SQL import tool.
It's all working well but I am unable to rename the columns to make it more user friendly. I'm guessing this is because the import tool needs the column names to match with the export source.

So for example instead of user_name I would want the column to be called Username. This is a simple example, I have columns that I need to completely rename since they don't make sense.

Is this possible, maybe as an alias? If not, how can I create a more user friendly view of the table? Using a summary view?