Toolbox Term Sort Children

When working in my toolbox, I saw the term Sort Children under the main menu where you can make more items or toolboxes. I did search the term Toolbox sort children, Item Sort Children.

so often my biggest problem is not knowing how to search for the answers correctly. I did search in the Help file also. using children and sort children?  I had started to ask this in VBA section

but thought it was more a standard Micro-station question.