Operations

The Operations block (found under Quantum in the Tools panel) is a gate catalog you can place on the canvas, the Qanvas equivalent of the Operations panel in Qompile:

To use it, first place a Circuit block on the canvas, then drag gates from Operations onto a wire on that Circuit block to place them, the same drag-and-drop motion used in Qompile. Not sure what a gate actually does? Every gate has its own page in the Gate reference.