When drawing a line (or polygon) annotation, holding shift constrains the new segment to form an angle with the horizontal axis which is an integer multiple of 15°. This is helpful when drawing, e.g., horizontal, vertical or 45 degree lines.
When drawing a line (or polygon) annotation, holding shift constrains the new segment to form an angle with the horizontal axis which is an integer multiple of 15°. This is helpful when drawing, e.g., horizontal, vertical or 45 degree lines.