The Merge Points commands allow you to merge the selected points in a Grease Pencil Stroke. This is useful when removing redundant points from a Grease Pencil Stroke and you want to remove while also controlling the resulting Point’s location and properties (e.g. Vertex Color, Pressure). To use the Merge Points commands, make sure you are in the Grease Pencil object’s ‘Edit’ mode. Go to Point > Merge Points (menu) > [Pick your option]. The options are Merge to First, Merge to Center, and Merge to Last.
Merge to First
Merges the selected points to the location and properties of the first point in the selected Grease Pencil Stroke Point sequence.
Merge to Center
Merges the selected points to the location and properties of the center point in the selected Grease Pencil Stroke Point sequence.
Merge to Last
Merges the selected points to the location and properties of the last point in the selected Grease Pencil Stroke Point sequence.