Click an empty spot to add a point, drag a point to move it, right-click or shift-click a point to delete it (on a phone: switch to delete mode).
Mathematics Foundations — Albert School · Lecture 2: Matrices, transformations & eigenstructure
Click an empty spot to add a point, drag a point to move it, right-click or shift-click a point to delete it (on a phone: switch to delete mode).