Hi, you can edit the color, hatch pattern or the line thickness of each wall layer, under the Attributes tab.
sorry, but i'v tried to costumize every tab in the attibutes options but still cant figure which one should allow me to put a line instead of a hatch... could you show me a video or say which option should I change?
See in the picture attached the place to edit the line attribtes of the contour of a wall layer. Take into account that in order to appreciate the lineweight or print color you need to activate the Print Preview in your viewport.
If you don't get a satisfactory result, please send me the model to firstname.lastname@example.org and I'll take a look at it.