1, first select the brush we want.

2. Then choose the brush thickness we want.

3. Then click the plus key in the lower right corner of the screen.

4. Then choose the shape we want.

5. Then adjust the position we want.

6. Then click Finish in the upper left corner of the screen.

7. Finally, click Save to Photo.

Open the mail. Click the icon in the middle left of the input box. The first one is graffiti. You can draw pictures directly and send iMessage messages to each other. The system versions above iOS 10 have this function.

The steps are as follows:

1. Open the system photo album, click to view the picture to be modified, and click the edit symbol below.

2. Then click the "…" symbol in the upper left corner in the pop-up tool.

3. Then click "Mark".

4. You can enter the marking interface. Remember to click "Finish" after marking, otherwise the changes cannot be saved.

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There are several ways to identify the authenticity of an Apple mobile phone:

1. The new iPhone battery has not been used. If the battery is found to have a long service life record, it is likely to be a refurbished machine. The method is to go to iPhone Settings-General-Power Settings to check the battery life;

2. Check the activation time. There is no activation time for the new iPhone. If there is, it is probably a refurbished machine, or at least it has been used by others, otherwise it cannot be activated;

3. Check the serial number. Every Apple computer has a serial number 1 1 (coded by letters and numbers), which can be queried in professional serial number query tools. When you buy a mobile phone, you should check whether the serial number of this mobile phone is correct in official website, Apple. If the serial number of this machine is cancelled on Apple official website after the motherboard has been replaced or repaired, the query "Sorry, this is the serial number of the replaced product" will appear.