Textured material editing

hi everyone,

I want to rotate the texture which i applied to the plane, how can i rotate that in sketchup itself???

right click the surface then from menu select Texture, then position, the pins then are used as labelled.
Adding Colors and Textures with Materials | SketchUp Help
latter part
“Repositioning textures”

Right click on the face, choose Texture>Position.

Then either move the green pin or right click and choose Rotate and the angle you want.