i downloaded illustrator quality within program/working space bad. whenever draw line, make square or anything, quality awful , pixel-ish. i re-downloaded illustrator faced same problem. when saved work pdf, quality normal. how can fix it? thank you. kyrajajaja, you may try new illustrator gpu beta, https://adobe.allegiancetech.com/cgi-bin/qwebcorporate.dll?h3vuk6 which bring 2015.1.2, seems solve of issues not solved patch/update, 19.1 (which gives cc 2015.1), should solve known issues not solved 19.0.1, supposed deal gpu issues , few others. or if not have 19.1, may try that. if not appear, sign out , sign in creative cloud application. after 19.1 update should visible in creative cloud application. failing that, may try toggling between gpu , cpu ctrl/cmd+e, or may try disabling gpu performance clicking rocket icon in app bar, or on top of menu bar, , deselecting gpu performance check box; may uncheck gpu performance in...