what is the arrow called?

[Ralf Mardorf]

On Tue, 11 Nov 2014 21:00:16 +0100
Ralf Mardorf <ralf.mardorf at alice-dsl.net> wrote:

> On Tue, 11 Nov 2014 11:26:44 -0800
> ToddAndMargo <ToddAndMargo at zoho.com> wrote:
> > On an Xfce windows, in the upper left of the decorations strip,
> > there is an up/down arrow that shrinks the window to the
> > decoration strip or expands it back to its original shape.
> > 
> > What is this arrow called?  
> 
> I'm neither running a Xfce4 session now, nor is my Xfce4 set up in the
> same way as yours is. At the moment I'm logged in an openbox session.
> 
> I don't have an icon in the decoration that provides this, but if I
> right click at the decoration bar I get a menu and for openbox it's
> called "Roll up/down".
> 
> Likely you can right click at the decoration bar for Xfce4 too and you
> likely will see what it's called for Xfce4.

I logged out of my openbox session and started a Xfce4 session. My
Xfce4 doesn't provide this arrow, but if I right click at the decoration
bar I get a menu including "Roll Window Up", resp. "Roll Window Down".
What a surprise ;).