Creation of custom Group - Left Pane "Holding" is not frozen and also row header

While creating custom groups, with many categories, left Holding column is not frozen. As we move through each category, we do not know what holding we are trying to assign category. We have to keep going back and forth.

I am trying to reduce the page zoom size to very small so that I can see holding and categories together.

If Holding column is frozen, it will be easy to manage easily.
Also row header needs to be frozen as well.
With 100’s of securities and more than 10 categories, it will be easy to manage the custom groups without errors