How to add a node/vertex in a QGIS edit session?

Question

I'm doing some polygon (boundary) cleanup, and am wondering if it is possible to add a node/vertex to a set of selected polygons or even a single polygon.

By the way, the QGIS topology editing tools are incredible - extremely simple but very accurate and take so much of the work away from doing such manual work.

QGIS gives the ability to remove selected nodes - amazing that the topology is preserved and even improved when cleaning up excess nodes. Great stuff!

Answer 1

With the Node tool (called the Vertex Editor in QGIS 3.0+) selected, simply double-click on a line segment you want to add a node to

Answer 2

To add to that, to delete a vertex, you will just need to select the point and hit the delete key on the keyboard.