Since the baseline was 50 pixels below the top of the original canvas, this means the baseline is actually 27 pixels (50 minus 23) below the top of the text, leaving 9 pixels for descenders.

由于基线位于原始画布顶端下方50像素处，这意味着基线实际上距离文本顶端27像素(50减去23)，为下行线留出了9个像素。