Can I have step by step instructions with screenshots on how to do the following?

Add/Remove column to table
Here are the steps to follow

To add a column you will need to

Modify the select statement and select the desired column, in the controller.
Add new element to datatables columns (should be in sequence) in the relative view file.
Lastly add the th tag with column heading to table head (should be in sequence).
To remove a column you will need to

Modify the select statement and remove the desired column, in the controller.
Remove the element form columns of datatables in the relative view file.
Lastly Remove the th tag with column heading to table head.