word processing tool bar

If it’s possible to make the word processing tool bar also customisable?
Now, only the general tool bar is customisable. I only can place the ‘subscript’ and ‘superscript’ buttons on the general tool bar, which was not handy. I hope you could make it possible to put all writing function buttons on the word processing tool bar.

The format bar? This post explains why it can’t be customised: