How to nail everyone to death

In nailing, the method of nailing others is as follows:

There is a nail mark at the top of the 1. text box (as shown in figure 1). Click it to open a dialog box (as shown in Figure 2).

Figure 1

Figure 2

2. Select recipients (multiple recipients can be selected)

3. Enter the message content

4. Click Send (steps 2-4 as shown in Figure 3).

Figure 3