I am new to QGIS, and this is a very basic question.
I made a new polygon layer, to trace cadastral boundaries off a raster map. I want the polygon nodes on adjoining acreages to snap together. Some do because I have 'avoid intersections' on. But if I have to manually move a node on one polygon onto a node on the adjoining polygon, I cannot get it to snap to it. I've read the manual, tried to sort it out, but I cannot make it work. How do I make it work? Refer to the screenshot.
I have used MapInfo for 14 years. It does not have an inbuilt way to avoid polygon overlaps, but its snapping is very straightforward.