How to enter the verification code of Post Bar

For example, when you want to post, the following is like this.

After entering the content of the post, click on the blank space in the box to the right of the "verification code".

Will appear

As shown in the verification code, just enter the letters in the picture. As shown in the figure, the verification code is "dddl" (the verification code is randomly generated), which is case-insensitive. After entering, click "Publish" or press Enter on the keyboard.