Not loadning the css from masterpage .aspx

Hi all,
So i just tested the new feature to edit websites with pinegrow,but i stubled up on som problems or maybe i am doing it wrong.

I opend up one of my .aspx files in pinegrow and i noticed that i do not get the styles and scripts etc due to them beeing in the masterpage.The way i did it was to add my site as a project in pinegrow and i opened my deafault page.

However due to the css and the scripts are beeing stored in the masterpage it does not load correct in pinegrow.
Is there a way to open my page and set the masterpage?

One thing i noticed in my project is that the masterpage is not opening in pinegorw and it’s not yellow like all the rest of the pages in my project.