Hi. Can anyone suggest me how to make pretty pictures for papers. I have to depict some enzymatic reaction mechanisms. I tried to do it in paint and power point, but it still does not look professional. I know GIMP and photoshop are two softwares used by graphic designers. Is it possible to make a picture from scratch with these softwares? I really like the pictures in books, I would like to make something like that. Thanks in advance. :)