You can change the opacity of the Navigation bar both in its active state and its inactive state. For example, you could choose to 100% when it is active so that it is clearly visible, but 50% when you are not using it, so that it does not interfere with your modeling.
- Click Customize on the bottom right-hand corner of the Navigation bar.
- Decide whether you would like to alter the Active opacity or the Inactive opacity, and select the relevant one.
- Select the percentage opacity from the drop-down menu.