Sounds like you are talking about drawing in paper space. LibreCAD doesn't follow that direction.
It's not difficult to simulate though.
Menu: drawing preferences > select your paper size and set margins all to 0;
Draw a rectangle to follow the scales paper size, say, a rectangle of 8.5/16 by 11/16 to simulate 1/16:1 from drawing to paper. Then, inside of the box, 1/16" in drawing will be printed as 1", if you choose fit to paper at printing.
In general, we leave printing as an independent step, instead of a controller for drawing coordinates.
carpenterson wrote
I read the manual. You did not understand my question. Before beinning to draw in cad, one first needs to set up the page with a specific scale so you can make drawings to proper scale and proportion. Other software (eg, smartdraw) has a "document setup" feature with dropdown tabs allowing the user to select units & scale, such as (in my case) 1/16:1, 1/8:8, 1/4:1, etc, all the qay to 10:1. Once selected, the user can draw lines to exact length as desired. I, and other users, have written posts stating we do not see this set up to scale function on librecad.