In GameMaker Language (GML), you can easily change the alpha of an object to create transparency effects within your game. This can be useful for things like fading in and out, creating ghost-like characters, or adding visual effects to your game. Here's how you can accomplish this in GML:

Step 1: Access the Object

First, access the object to which you want to change the alpha. You can do this using the object's name or by referencing it through its instance ID.

Step 2: Change the Alpha

Once you have the object, you can change its alpha property to modify its transparency. The alpha value ranges from 0 (completely transparent) to 1 (completely opaque). Use the following code to change the alpha of the object:

```gml

object.alpha = 0.5; // Set the alpha to 50%

```

Step 3: Utilize Alpha in Game Events

You can incorporate the changes in alpha within various game events. For example, you can gradually increase or decrease the alpha value to create fade-in or fade-out effects. This can be done in the Step event, Alarm event, or any other relevant game event.

Step 4: Test and Iterate

After applying the alpha changes to your object, run the game to test the effects. Make adjustments as needed to achieve the desired transparency effects.

By following these steps, you can easily change the alpha of an object in GML to add captivating transparency effects to your game. Experiment with different alpha values and incorporate them creatively to enhance the visual appeal of your game. Happy game developing!