For Crystal 8.5, there is a [Zoom] command under [View] on the menu, you may also have it on the task bar. Zoom up to 150% or 200% and it becomes easier to make fine adjustments.
Select [Options] under [File], this lets you change the [Snap To Grid] option, i.e. do you want the machine to move your lines to the nearest grid point or not. Lots of other useful options, including setting your own defaults for fields. You can also switch the grid on and off, and change the size of its dots
As for units, this is an American product, and hence foreigner-hostile. But my machine uses centimetres, but I don't know how you control it. It may be a setting for the PC as a whole.
Madawc Williams
East Anglia, Great Britain