The randomizer have multiple special commands related to the randomizer itself. Most of them are also accessible from a Custom Wheel which works just like the weapon wheel from the vanilla game. You can open this wheel by pressing V on your keyboard or holding both shoulder button on a controller (you can rebind this action to whatever you want).
Headers can also add custom functionalities in this wheel, such as the Progress Helper header which is adding a way to see at any moment which trees, quests and wisps you already have collected and which one you still need to collect.