Proportional edit mode can't be activated Need to grab that selected vertex that you can see on the screenshot using "Proportional Editing". However, even though I activated this mode, every time when I press "G" and try to grab the vertex, the circle of proportional editing does not appear. Initially, there was a thought that circle is large a little bit so I was trying to use a scroll to make it more small, but there is not circle at all. How to solve this issue?
3D cursor should be aligned with the object you edit.