page overlays that push page contents across

[Glyph]

Does anyone know a way to make page overlays push the underlaying page content across, rather than overlay it? If you see the menu on this site you will see what I mean.

https://www.generalstudios.com

The right hand panel could easily be created as an overlay in Lay, however I'm trying to work out a way for it to slide the main page content across at the same time>

[arminunruh]

hey theres no option to do this and no easy way to custom code it.
i will write this down as an idea