I am new to the whole QGIS platform but have worked out adding layers, shapefiles, polygons etc. and the rest of the simple stuff. But just now the polygon I am trying to add disappears when I right click at the end.
Weirder though is when I first right click it's as if I have clicked somewhere way off the canvas. I am confused as I have been doing this simply for the past couple weeks. No hassle.
I am working with QGIS 2.14.17.