In the mini-world game, you can use customized actions to dress up the player's role. You can set it as follows:

1. Open the mini-world game and enter the profile page.

2. On the profile page, click the "Appearance" option in the left column.

3. In the appearance page, you can select various character attributes such as avatar, costume, dressing, background, equipment, action, etc. Among them, action is the custom action you want to set.

4. Click Action, select the custom action to be applied in the pop-up window, and then click OK to complete the setting.

5. After saving the settings and quitting, your player character will use the actions you set.

It should be noted that setting a custom action requires purchasing and unlocking the corresponding props or attributes. Some customized actions need to be purchased in the mall, while others need to be unlocked by customs clearance tasks or achievements. Therefore, when setting, you need to pay attention to your own attributes and props, and choose the customized action that suits you.