Articles Contents pane NOT scrollable

Hello,

I've recently created some lengthy articles within my knowledgebase. The capabilities are accomodating my content well, however the amount of information I'm putting into a single article/topic results in a large CONTENTS to the right of the content itself. This contents pane is longer than my 4k screens height and, as a result, I cannot use it effectively. To see the bottom of the contents list I have to scroll to the very end of the article then scroll up to find the link/section I'm searching for. 

Can you make the contents section have its own scrolling capability?

thanks,

Pete