In both LO15&16 the Zoom to Fit function doesn’t really work to scale the drawing to “fit” the screen.
I use a 23’ monitor and A3 sheet size; all other variables (tools, etc.) aside, the scale to fit number ought to be about 76% (of the original sheet size). But it’s more like 66%.
Now, this may seem a little nit-picky, but i wish there was a default zoom that could be set in the prefs or template.