Hit a pin, and click
The following softkeys become available.
This is three routing mode. When
F5_Disable_Branch mode is selected, it is not possible to create a branch to another trace, but trace to another pin can be created.
F6 button allows connection to a segment of another trace.
F7 button allows connection to a vertex or a via of another trace.
In the drag mode, if you right-click, dragging will be stopped and the last vertex of the copper trace will be highlighted.
You can move it on vertex of another copper trace (on same net) to create a branch. To do this, press
F4_Move_Vertex to start dragging.