Find any Pixaroma node
Three ways to find a node: search, the Nodes panel, and the Pixaroma Help window that explains each one.
Search for it
Double-click an empty spot on the canvas and type Pixaroma, or part of the node's name. Click a node to add it, then click the canvas to place it.
Browse the Nodes panel
Click Nodes on the left (older ComfyUI calls it the Node Library) and open the Pixaroma folder. Its nodes are sorted into Editors, Image, Prompt and Text, Values, Resize and Crop, and more.
Read what a node does
Click the ? button in the top toolbar. The Pixaroma Help window lists every node with what it does and how to wire it.