16:9 Aspect Ratio

Hello, 

When exporting a video in SW 2017, I am able to choose a custom aspect ratio (width : height). 

However, is there a way to show this earlier on so I do not have to guess and check the visible area of the aspect ratio?

Exporting Picture (Magenta lines show 16:9 outline):

Normal Editing View (No reference for knowing 16:9 cutoff):

SolidworksMotion Studies