To save a screen or load an existing screen you must first open the stock screener.
To do this, see the FAQ item How do I log into the stock screener?
Set up and save your screen
This article shows you how to set up and save a stock screen: How to run your first screen with the Quant Investing stock screener.
Save the columns you want to see
To save the columns you would like to see when you run your screen, look at this article: How to create and edit Templates in the Quant Investing stock screener
This article may also interest you:
How to track your portfolio with automatic updates of closing prices and ratios