I'm wondering, for a given font which I have the .otf file for, is it possible to adjust the fonts initial line spacing? For instance, I'm an iOS developer, and I noticed when you set a fonts line spacing to 0 within the program, it may differ from another fonts line spacing which is also set to 0. This leads me to believe that differing fonts have differing line spacing when at 0? Is it possible to do this using TypeTool?
Thanks.