1. Open the post-it application on vivo mobile phone: users need to open their own vivo mobile phone first, and find and open the post-it application.

2. Create a new post-it note and click the picture at the bottom: icon In the post-it note interface, click the plus button in the upper right corner and select Create a new blank note from the pop-up menu.

3. Select the "Graffiti" option to draw on the page.