Thank you for your quick answers, nevertheless I have a hard time expressing myself.
Indeed, changing the scale of a view of a plan is not an unknown task, what I am looking for is how to display the plan at a scale of 1:1 in relation to the screen. That is to say that I can press a key and that the zoom adapts so that the drawing is displayed on the screen as it will come out when printed. So for example for an A4 I should be able to put a sheet of paper in front of my screen to compare the size.
I'm not sure that such a thing is possible (you would have to take into account the display resolution of the screen) but if it's feasible, I'm all for it.
Since the beginnings of the CAD and then the CAD, this question was already asked and has always been asked. There is no positive response to your request. Indeed, depending on the size of the screens, the different resolutions, the multitude of graphics cards, the size of the window in which the application is opened, etc., there is no software that can provide you with the display to scale on the screen (by which we mean Example: an entity with a dimension of 100mm, if we measure it directly on the screen with a ruler we must find 100mm, right?). In addition, it would not work for parts that do not come out of the screen!
Precisely my question was there to avoid this "tinkering". What surprises me in what you say is that the macros presented work very well for the same operation but on parts: you have to calibrate the screen at the first use, then when you launch the macro the part is zommed to be displayed at full size.
However, this doesn't work properly with a drawing, and I thought maybe we can adapt this macro to work with a drawing as well.