Scaling of mechanical drawings drawn by CAD. Paper borders are drawn according to the size of the printing paper.

Enlarge the picture frame. How many times depends on how you feel fit. When printing, the printer will automatically match. In other words, you only need to choose the frame and the paper size. How to enlarge and reduce the picture frame? You should know, right? Enter SC enter, then enter the proportion and enter. If you want to fill in the proportion in the picture frame. Just measure the length of one side of the frame and divide it by the drawing size you choose. (A4 ratio = long side length /297, or short side length /2 10). In fact, there are many methods, but this method needs to be understood.