GOM Player supports SMI, SRT, RT, SUB(with IDX) files for subtitle. You can specify margin, location, size, resolution, font and others. You can also enable shadow, view ASF files with subtitle, karaoke subtitle mode. You can even synchronize subtitle and video if there's any mismatch.GOM Player supports playlist formats such as M3U, PLS, ASX. You can include different media types on a playlist. Also, it also lets you edit playlists for different media types. It's easy to create and edit your own multimedia playlist with GOM Player.