Odd, the crosshair I see is black with a white outline. What OS are you using?
The toolbar we use in the CP figure window is documented here:
matplotlib.sourceforge.net/users … olbar.html
You can zoom out by either using the back button to undo previous zoom-in operations, or by using the pan tool while holding the control key. I realize this isn’t the most intuitive way to zoom out, but we have leveraged this library to save ourselves the trouble of writing twice as much code. Given the free time, we’ll certainly consider adding a special zoom-out tool to the toolbar.