Hi, I have AutoCad for Mac 2015, how I could change the dimension of a material? For exemple I put a roof covering material on my roof, but the single tile is to big, and it doesn't look realistic. I check on youtube for some tutorial, I did't find the answer but I saw that I miss the button "Swatch size"(that every user on youtube has); it's maybe that command that I need? How can I find it?