Change default rem size in dev mode

I cannot find it either. I can just switch between px and rem units in Inspect panel but there’s an input missing to define the base rem value.

1. Select any object;
2. In the Code section, click on the settings icon (Inspect settings);
3. Select “Set unit scale…” item.

Perfect, thank you!
Unfortunately this is way too hidden and should also be displayed in the default Inspect Panel as well.