When editing and creating geometries, mistakes often occur. Mistakes such as a misplaced click or a missed snapped point are common errors that you could introduce. A simple way to correct any poorly placed nodes is to use the vertex tool when editing has been toggled on. Click on the Vertex Tool and select the Vertex Tool (Current Layer) option:
The editing toolbar with the vertex tool selected
As you move your mouse over the feature you want to edit, the nodes will show up as red dots. Left-click once on the red dot to select the node and then reposition it as required:
Editing a segment
You can add ...
