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For more information check out the page: 3D Assets
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Toggle between 3D viewer and a 2D display of the elements thumbnail.
The grid can be dis/enabled by the icon in the bottom left corner.
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Take a screenshot of the current viewport, to set a new element thumbnail.
Click the screenshot button in the bottom right corner of the 3D viewer.
Display Options
There are three display options for the 3D viewer:
textured
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metalness-roughness
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wireframe
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metalness - roughness
If the display is set to metalness-roughness you can use the two sliders to control the metalness and roughness of the load 3D model in the viewport.
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HDR
The preview HDR can be changed for the modes: textured and metalness-roughness
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