How to rotate tiles?

After completing the texture mapping, please click on the wall/floor in 3D mode or Roaming mode – at the bottom of the design interface – select Rotate Texture 

       

If it's custom tiles, please enter the Custom section, select the tile, and on the right property bar, click Rotate or input the rotation angle

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The method for rotating a single tile is as follows: Rotate and then completely cover the area.