what does OTF mean
OpenType is a format for scalable computer fonts. It was built on its predecessor TrueType, retaining TrueType's basic structure and adding many intricate data structures for prescribing typographic behavior.penType features are tedious to define using a GUI. Consequently, Adobe standardized a text specification format for feature files, which typically have a name ending in a .fea extension. These files can be compiled into the binary font container (.ttf or .otf) using Adobe FDK (AFDKO), FontLab or FontForge.