Fluidity of altitude angle changes

During a fluent writing movement, the angle of the pen automatically changes according to the shape of the letter being written. Changes in the vertical angle can be compared to the upward and downward movements of the pen, such as in vertical strokes.

The fluidity of vertical angle changes refers to how smoothly and evenly these changes occur and how well they are integrated into the writing flow. A relaxed pen grip, with movements primarily coming from the fingers, promotes this flow.

Poor control over the pen tilt is evident in sudden changes in the vertical angle, such as jerky movements or irregular stroke direction.