New User-- Drawing Preferences

Hello,
New to Forums in general, so here goes.
Recently downloaded LibreCAD to renew basic user interest in CAD, which I learned on AUTOCAD ver 2.6 in the late 1980's.
Having trouble with "Drawing Preferences", "Dimensions".
When "Linear Precision" set to "0", all the "0"s in numbers such as "30" and "80" disappear and showonly as "3" and "8".
I don't want to set to "0.0".
Any suggestions, please.
Thank you.

Version 2.1.3, Compiler GNU GCC 4.9.1, Compiled on Sep 23 2016, Qt Version 5.4.1, Boost Version 1.60.0.