I need to know changing the size of a document and what the lines mean indesign
Hi I made a document with 3 pages, one for my letterhead, one for an envelope size and last one for a business card with measurements provide by my professor, I went ahead and put them in the window from file document setup, but my business card came out too big. I don't know if I am going too far with my design and maybe I am getting out of the space that I am supposed to be working on. I don't know what the color lines mean.
can you tell me how to change the pages size without changing all them.


what I am doing wrong?
