Can buttons in the menu be removed?

[AvidReader]

In MC you have the standard menu. Directly below there's a bunch of buttons, starting with Refresh and ending (in my case) with the different drives I use.
My question is: can buttons be removed ? If so, how do I do that?

Thanks, people! 

[Matthias515566]

Ctrl+B or View> Button window

[AvidReader]

Sorry, that's not what I mean. I've attached a screenshot with a black arrow. The arrow points towards the line of icons (I referrred to them as buttons, which probably caused the confusion) that I want to edit.

Is that possible?