U3824DW, supported PBP Modes?

Hey everyone, I want to buy an U3824DW but was not able to find out which Picture-by-Picture (PBP) modes it supports. The default pbp 50:50 would not be my preferred option, but rather 25:75 or 33:67. 

In the display manager documentation, I found that the CLI theoretically supports various pbp modes like 25:75 - but "the available modes are subject to the monitor models". 

https://www.dell.com/support/kbdoc/en-au/000060112/what-is-dell-display-manager

I already own an U2722DE and when trying pbp modes like 75:25, the CLI cannot execute this command. Thus, I assume it is not supported but found no documentation whether it is supported or not - the GUI only gives me the 50:50 option so I assume it is not supported.

Thus, can someone please tell me the available pbp modes of the U3824DW?