Question: In SMS as per 3GPP specifications, when a "round corner" indicator is set for a Rectangle (or Square), how should the radius of the rounded corner be determined in relation to the rectangle's dimensions?
Option 1: Fixed at half the length of the longer edge
Option 2: Proportional to the rotation angle of the rectangle
Option 3: Exactly 10% of the sum of the width and height
Option 4: Recommended as 20% of the length of the shorter edge (for both rectangles and squares)
Explanation: This is correct because, according to the specifications, when the "round corner" indicator is set for a rectangle (or its special case, a square), the recommended radius for rounding the corners should be calculated as 20% of the length of the shorter edge. This ensures consistency in visual presentation across different sizes and aspect ratios of rectangles and squares, enhancing user experience in SMS media transfer.