Problem scaling 4k resolution in Bionic64

[Zuzia]

Hi same as subject.
I use puppy bionic x64
in resolution full hd 1920x1080 all looks good
but my dell can ez display 4k 60Hz
3840x2160
When i setup this res in nvidia panel all works normal but OS UI is too small how i can change only my all UI size scale up to 200%?
without change resolution?

link for screen coz atachment file is to big
https://ibb.co/4fCv9Lr - 4k res look UI so small how i can rise scale to 200%
https://ibb.co/NN4N2Q0 - HD res UI looks nice and normal.

Please help, thanks cheers from Poland.
PS.
I use nvidia drivers and works normal

[bigpup]

This has some effect.
menu->Desktop->JWMDesk Manager->Screen Font
Make the global fontsize bigger

For change to take effect must restart X server.
Menu->Exit->Restart Graphical Server