How to change the size of edit operations window

Summary:

I use page composer to change the size of edit operations window. But the column is not automatically occupied the full window. What are the setting to display the columns in full size window. It will be helpful for the user to see more information without scrolling to the right hand side.

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

25A

Code Snippet (add any code snippets that support your topic, if applicable):