@Lempster

Can you tell me what effect joining an extra dimension table to the fact table (already connected to other dimensions and is loaded with data and without adding additional rows...

Yes, the Fact Table is already linked to other dimensions and has data in it.

I'm new to ETL. Can you give me steps how to proceed?

I basically want to increase...

I meant 5 "rows", not columns. There are only two columns: ID and Name

Steps I followed:

In the object explorer, Go to tables -> Right Click Fact Table -> Modify

You can...