Transparency is one of the options in the Category list on the Effects tab in an object’s Properties dialog box.
This effect allows you to change the level of transparency for an object. In the example below, the dark blue text has been made 75% transparent:
Note:
You can also make an object transparent using the Transparency Slider on the Objects Properties toolbar.
If you want to change the transparency of an object, use the spin buttons beside the Transparency option to increase or decrease the amount. By default, the option is set to 50% transparency.
Click on the Apply button to save your changes.