Make mask toolbar reapear.

When I make a mask I have this tool bar on the left side of my viewing window. When I click on another node in my flow and then click on my mask node again it is gone. I can make it reaper by creating a new mask, undoing that then clicking on my original mask. There has to be a better way. How do i make that toolbar reaper?

Thanks.

I figured it out. If I turn off show view controls then click on another node, when I come back the toolbar is gone. I just need to turn on show view controls and click on another node, then back on the spline node.