Thank you Steinberg for creating a new version of Cubase and taking away the one tool that allowed me to read the font on your DAW. HiDPI Scaling adjustment. I adjust it to +25 and everything is larger and usable. That was on 14 Pro. Why would you take that away?
I’ve tried countless combinations of windows setting and Cubase 15 settings. Nothing!
Can anyone tell me what I’m missing here? There’s got to be a way to get this GUI larger, with larger text.
No worries, it’s still there.
Edit/Preferences/User Interface/Application Scaling
This was mentioned in another topic so I looked up the Help.
Cubase 14 Help has the Application Scaling combo.
Cubase 15 Help doesn’t.
I don’t have Cubase 15 so I may be talking through my tuba.
As @Reco29 already mentioned, the item got moved within the preferences.
I was being pedantic (my forté!), because it isn’t still there - it’s been moved elsewhere. Application Scaling and the on/off toggle should be together, not on separate tabs/pages.
I usually forget that English as a first language is possibly in the minority on this forum.
Anyways, I enjoyed playing the tuba.
@Reco29 's answer should be marked as the Solution.
Well, from a linguistic perspective, here in the field of Pragmatics, the I-Now-Here triad explains perfectly well that still “there” is merely a subjective manifestation of the speaker’s spatial deixis (based on Karl Bühler’s famous theory from 1934)… 
Haha, nah, it’s all good, @Googly_Croft ! Seriously, I could have been more precise by explicetly pointing out that this option has been moved within the preferences. Really, my bad. Instead, I just said that the feature itself has not vanished into thin air, that it’s still there in general, and where to find it.
Thanks both of you guys (@Johnny_Moneto and @Googly_Croft ) for chiming in - the more info the better 
@Reco29 I wasn’t having a dig at you. Or anyone. (@Johnny_Moneto )
I was actually trying hard, very hard, not to start ranting about Steinberg’s arbitrary and, to me, pointless moving of the furniture, as it were.
This one in particular seems extremely arbitrary. A toggle on/off checkbox separated from it’s related options combobox. To stick with the furniture analogy, it’s like having the dining table in one room, and the dining chairs in another.
Thanks to all. I never would have found that. I was sitting on the floor of the dining room in disgust. The placement makes no sense to me but I’m happy to have you folks help me out.