The plugin comes with one general settings page which allows you to control the appearance of all the 3D viewers at once. You can control button colors, icons, texts and styles.
Changing viewer colors
First you can customize the viewer background color and the loader bar color and indicator.
Next, you can control the base button styles like the 3D and AR button appearance, and the close button appearance.

Customize viewer controls
In the next panel, you can customize the button contents and positions.
For each button you can choose to override the icon or hide it. And optionally to add text in the button.

PRO plugin appearance settings
If you are on the PRO version, you will see two additional tabs.
The first tab is Shop page and QR.
Product loop item settings
In this tab you can find settings for what to display on shop loop pages, and to customize the QR code modal contents and colors.

Customizing annotations
The second tab is called “Annotations”
This tab allows you to customize the annotations texts, buttons and icons.

Advanced
The final tab is the Advanced tab.
You generally do not need to use this tab. But you can find more details about it in this post.