Installed TSW4 God Mode mod from https://www.trainsimcommunity.com/mods/c3-train-sim-world/c75-utilities/i2703-tsw-god-mode-alpha-033

It's main uses seem to have been superceded by the new free roam options in TSW4, but it does have abilities to set the weather environment, time of day and other variables within a scenario.

I think it also allows greater zoom in and out capacity when driving a train (which is very useful) or is that just in my imagination.