Adjusting opacity lets you control how transparent or solid a widget appears, helping you create more visually engaging designs.
Step 1:
Select the widget whose opacity you want to adjust.
Step 2:

Why does my widget look faded or transparent?
Your widget may appear faded or transparent because its opacity level is set lower than 100%.
To fix this, select the widget and increase the Opacity value from the contextual toolbar until it looks the way you want.