Manual

Simple graph editing

Create vertex: left-click
Delete vertex: double left-click
Create edge: left-click on vertex, then left-click on other vertex or empty space
Delete edge: left-click on edge

Vertex splitting

Right-click on vertex to be split
Left-click(s) on blue vertices to cycle options
Left-click on empty space to complete operation

Vertex merging

Press m, left-click first vertex, left-click second vertex

Subdivide edge

Right-click on edge

Create labeled vertex

Press l, enter label, create vertex as usual

Mark/Unmark component as forbidden induced subgraph

Create edge that alredy exists. (Left-click on both endpoints of existing edge). All edges and nodes not marked in a component that contains marked vertices are 'scaffolding': Use this to declare forbidden induced subgraphs that are not connected.

Cycle through found forbidden induced subgraphs

Press n for next
Press p for previous

Import/Export

Export: download workspace with "Save" button
Import: drop saved file on page via drag-and-drop

Copy/Delete/Cut component

Copy component: Press c, left-click vertex of component to copy, left-click on empty space or vertex
Delete component: Press d, left-click vertex of component to delete
Cut component: Press x, left-click vertex of component to cut, left-click on empty space or vertex to reinsert