Z-Sphere retopology cant make verticies show

SoulGatherer

Hi there, in every tutorial as soon as they turn on edit topology on a z-sphere the vertices show as small squares, but when I try it only shows the edges, does anyone know why this is occurring?

My model


Model from the tutorial

kanga

If you click on the background/canvas the junction check marks will disappear. Click on a junction to keep drawing. Press 'A' to see a preview of the new topology to check the integrity of the mesh. Hold shift and click on a junction to draw from that point.