How does my world display content in bold?

1. First, the player opens my world and clicks on more icons below.

2. Next, the player needs to choose to open the item bar, choose the third one and find the billboard.

3. Then, the player takes out the signboard and points to the ground. Signboards need to be installed on the three-dimensional square.

4. Then, in the input method, the player finds the mathematical symbol and finds out&; L (bold) Enter the symbol.

5. Enter &; After the l symbol, enter the specified number or letter, and bold words will appear.