Table mode is the same randomizer in a small bare window with no menu and no page around it, sized to sit in a corner of your screen next to the poker client. Click it as often as you like for one window per table. Every window is its own randomizer: it opens with the actions and split you have set here, and from then on you can give each one its own without touching the others.
Name each action and give it a share. The roll is a whole number from 1 to 100, so a 50/50 split means 1 to 50 is the first action and 51 to 100 the second.
Solvers hardly ever want a spot played the same way every time. A river bluff-catcher might be a call 70% and a fold 30%, and a 4-bet bluff might fire two thirds of the time. Deciding in the moment quietly turns those splits into habits, and habits are what your opponents read. Rolling a number removes the choice: set your split, roll, act. Nothing here talks to the poker client and no hand information goes in, so it is the same as keeping a die next to your keyboard, which every room allows.