I just extracted Twitter's iconography glyph font (before the new redesign) to also keep it in history (because I also much love it than the new one imho) and also study and use it on my Twitter UX concepts (the copyright is all on Twitter, just using it for my personal uses only), It's called Rosetta, but when you convert that WOFF font to OTF or TTF from any converters online, it shows a big vertical bounding box below, which makes picking glyphs on Photoshops difficult as they're cropped, like this:
How could I modify it using a 3rd party font maker tool like FontForge to remove that bounding box below so it will show correctly?