Zoomed in problem

Hi PowerBI team,

I have an issue with the zoom function in PowerBI. Whenever I have a pop-up screen appear in PowerBI, I note that large parts of the screen are not visible to me in the pop-up window as it appears to be too zoomed in, and I cannot change this using the slider on the bottom-right of PowerBI Desktop. 

See below screenshot as example. Can somebody help me get this window zoomed-out so that I can see all of the functionality again?