How do you level these pool table legs?

Put a long, stout plank of wood under the base and rest it on a block. Use that as a lever to raise the table enough to slip another block  under to hold it  while allowing the foot to turn. There should be a place to fit a spanner on the foot which you turn clockwise to raise and vice versa. Put two spirit levels on the top at right angles and keep checking progress by lowering back onto the foot

Get a big crow bar and jamb it underneath on the low side, push down and the table should lift.  Stick a shim or a rock in the gap and set it down.  Repeat until it is level.  You can turn the disc at the risk of smashing your fingers.  Hopefully, you know how to repair the wood flooring.

You have to take the weight off it before you are able to turn it, there are many ways of doing that.

This is a 2 or 3 person job. 1 or 2 people lit each corner and read the level. The other turns the feet.

you use a hydraulic jack, with suitable padding, to raise the table so you can turn the feet to level it

Get someone to block up the table with some books, then you can adjust the leg with out being in a strain .

I found a YouTube (level pool table) that was interesting but he didn't show how to lift the table. You COULD just get someone hefty to lift up the end of the table a bit, if the weight isn't excessive.

Otherwise I might look at the bottom of the leg to be sure it's solid. I have a 3 foot long crowbar. You could put a block of wood on the floor (like 1" stock), put the tip of the crowbar under the leg, and lever it up a half inch pretty easily.

I'm saying to use great care, not to take a crowbar to a pool table. And be sure of who is lifting because it will break your hand if it falls.

You are NEVER going to turn those without lifting the table a bit.

Get a few beers drink them andbput the labels under to level them i havent mannaged it yet i get drunk first but i will keep trying 

The legs most likely screw up or down.