What is the graffiti on Apple's mobile phone?

Try dragging the resize handle up and down to resize the handwriting area.

Click to open the memo of Apple's mobile phone, click the New button in the lower right corner, and select the appropriate pen and color to draw.

Graffiti refers to artificial and intentional marks on public and private facilities or walls, which can be pictures or words. The word graffiti comes from Lu Tong's evaluation of his son's graffiti trip in Tang Dynasty.