Zooming in Chrome with physical keyboard/mouse (OTG) on Android phone

[zhalasz]

I didnt find any key/mouse combo or mapper which could solve this task: zooming in a browser on my phone, using OTG keyboard and mouse.

Is there any possibilities to do that?

There are lists about zooming shortcuts, but I tried all and none of them are working. Searched also MIUI specific info, but no use.

Thanks in advance!

Xiaomi Redmi 4X, MIUI 9.5, Android 7.1.2