I’m new to blender and modelling, and I’m currently trying to create a one floor motel house, however due to the building plan I’m using being kind of low resolution, and anti aliased, the lines are kind of blurry, so when I create the door gaps for each wall, it is very hard to see if each gap is the same size.
So, I’m wondering how I can measure the length between 2 points, so that I can make each door gap exactly the same width.
I would prefer the measurements to be in the metric system, since I am not familiar with the imperial one.
Or if there are any other ways to achieve what I’m trying to create I would be happy to hear those as well. 

