Structure#
Grease Pencil object has three main basic components: points, edit lines and strokes.

Example of Grease Pencil structure.#
Points#
The main element used in editing Grease Pencil objects are points. Points represent a single point in 3D space.
Each point stores all the properties that define the final appearance of the strokes as its ___location, thickness, alpha, weight and UV rotation for textures.
Note
Point (Grease Pencil) and Vertex (meshes) are equivalent names.
Edit Lines#
Points are always connected by a straight line, which you see when you are editing in Edit Mode or when you look at a stroke in wireframe view. They are invisible on the rendered image and are used to construct the final stroke.
Strokes#
The stroke is the rendered image of the points and edit lines, using a particular Grease Pencil material. (Grease Pencil materials are linked at stroke level.)