Many of the assets available within the Content Browser have thumbnails that can be rendered in real-time. This allows for quick preview of the given asset without having to open it up in its respective editor.
The following types of assets can be viewed in real-time:
To preview a thumbnail in real-time, click on the button located at the bottom right of the Content Browser. In the pop-up menu that appears, choose Thumbnail Edit Mode. The bottom of the Content Browser will display the following:
While this is active, you can drag on any of the above listed asset types to see them within a 3D environment. The controls are as follows:
Left mouse-button drag
Rotates around the asset.
Right mouse-button drag
Zooms (dollies) the camera in and out.
When previewing a material in real-time, you can click on the small primitive icon in the upper-left corner of the thumbnail to change the display primitive.
When finished previewing your assets, simply click the button.