“Next Subtitle” shortcut

Hello
I need some help
Now I’m using Aeon Nox 5 SILVO skin
I want a keyboard shortcut which do this thing:
https://postimg.org/image/huwaxvfot/
On Aeon Nox there’s no similar option and I need to choose next subtitle manually (when subtitles are wrong e.g.)
It takes some time.. and it’s uncomfortable
Is this even possible?