Application to seemlessly magnify an entire application window?

[NeilF]

I simply want a tool/utility to say increase a specific application window by 25%-50% in size/scale, such that everything in it is enlarged?


Thusfar I've only managed to find magnifying glass type utilities. I want an application that seemlessing ups the size/scale of an application window.

 

[asim18]

Tried using a lower resolution?

 

[NeilF]

Tried using a lower resolution?

Only require it on a/one specific application window...

Can't believe there isn't a tool to simply up a single specified window by 25 or 50% for example. And do it seamlessly as if it were actually that size?