Vertex Snapping and Trace Tool in QGIS 3.10 - YouTube
15.3. Editing — QGIS Documentation documentation
QGIS Snapping – Antonio Locandro
Editing — QGIS Documentation documentation
qgis - snapping polygons and lines - Geographic Information Systems Stack Exchange
Snapping and tracing stopped working completely. Both functions are active. Both layers have the same reference system. What do you think is causing this problem? : r/QGIS
Snapping while measure in QGIS? - Geographic Information Systems Stack Exchange