Zoom out

Hi!

I did zoom in at a histogram but there is no way to zoom out except pressing back botton. Is there any other way to zoom out that I am missing?
Also when you zoom in in a visualization of an iframe there is no way to see that through the "time filter" or a filter addition at the top of the iframe . Is there a way to add a filter at the top of iframe when you do a zoom in?
Thank you in advance!