In Surveyor the arrows can't turn off in TRS2006.
In Driver pressing Ctrl+H, (or is it Alt+H) turns off the arrows.
If you surveyor options turn on/off contextual information, and go into trackside or some other tab, then spline point circles are hidden. IDK about switch arrows.
In TRS2006 pressing Alt+U, or Alt+Y allows walk and flly.
In Driver the line -freeintcam in trainzoptions allows you to roam about the cab and outside the cab of another loco, to take screenshots, using the KB arrow keys.