Change TAB size. NOT spacing but FILE NAMES at top

I have learned how to use multiple tabs to build a sketch instead of writing code all one "page". This is awesome. I am rewriting a sketch I started 6 months ago that just got way to cluttery. Now that I have learned about tabs I can keep it much more organized and do WAY less scrolling.

My question is how do I decrease the width of the tab that has the file name in the sketch? I have a lot of tabs in this sketch and am using a scroll bar to scroll left to right through them. If I could decrease the width to about .75 or .5 the "stock" width that would be great. It would eliminate the need for the need for the scroll bar while still showing enough of the file name that I know what it is.

I am NOT referring to the amount of spaces the cursor moves when hitting the tab button on the keyboard. There is tons of info online about that. This is about the tabs at the top of the sketch that include the file names.

My ide recently updated and I am unsure of the version I am using. All I can find on my computer is this: arduino-ide_nightly

Thanks for the help.