mp3 creating button, copy and paste subtitles, and 2 more

PLEASE, add mp3 creating button if we want to export just only voice part, and also copy and paste subtitles function to ad our own subtitles not writing by hand but using copy and paste function. And also selecting voices to apply them all one sound effect, too- now we do it one by one, it takes much more time. Also if you can add screen photo download to use as thumb or cover to the videos it will be great!

thank you for your attention, hope soon we will use this new functions..