Angel, I realize you are not a trader, but hopefully this post helps you.
TYTN has a A/S of approx 6 billion, which means that is the most shares they can issue throughout all the stock classes, common & preferred.
In terms of the split, ML can do whatever he wants. He can just reverse the commons, or he can just reverse the commons and one class of the preferreds or he could reverse all commons and all preferreds.
The most common split only affects the common shares.
Finally, ML could reduce the A/S to any number he wants and is not tied to any ratio. He could leave it alone, reduce it to 5 billion, 1 billion, 500 million .....
As long as, post split, the total number of common and preferred shares don't exceed the A/S number.
Usually, post split, a company leaves a lot of room between the o/s and the a/s.