The biggest issues with Trainz Help, in whatever form it takes, is that there is not a definitive cross referenced index. What is presented is generally good assuming you know what you are looking for and can find, or search for it in the first place, but too frequently you can't leaving many frustrated and requesting help as in this instance from other, which thankfully is given generously.
Equally many aspects of Trainz are likely not documented/recorded at all, and unless they a mentioned or questioned in for example this forum others are totally unaware of their existence, depriving many of extending their enjoyment of this addictive pastime.
New releases of Trainz, new routes, rolling stock and so forth are all very nice and eagerly awaited, but some order of consolidated user reference would be as equally appreciated. Peter