Smudge tool moves entire line instead of moving one point of the vector line?

Hello! I want to give Pencil2D a try for a quick hands-on animation tool. However, when I draw a vector line, and then use the smudge to try to edit its points, it instead moves the entire line around. Am I not pressing the right keys or what is it happening?

Yes in certain circumstances it can, but if you deselect the line and then click on it again, the control points are made visible and you can then move individual points.

Line deselection is acheived by clicking outside the shape with the Smudge Tool.