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Click on the 3D model and navigate to Properties window. Under Rendering section you can uncheck Show to hide the object or check Show Label to show its name.
After importing, every 3D model will have its shading mode set to Shaded. You can change that in the Render mode drop-down menu.
If you use a 3D model for projection mapping, it is best if you set the shading mode to Unshaded. Otherwise AutoBlend won't work properly and projection might not look as intended.