button left ---- previous line
button right -- next line
button OK ---- next line
button up ----- 10 lines back
button down - 10 lines forward

button 1 ------ slowing down subtitle speed by -5ms
button 3 ------ speeding up subtitle speed by +5ms
button 4 ------ slowing down subtitle speed by -25ms
button 6 ------ speeding up subtitle speed by +25ms

button 5 ------ moves subtitle to current EPG time
button 7 ------ moves subtitle to position it was before you left the plugin
button 9 ------ returns subtitle to position it was before and adds expired EPG time