You can reposition 2D textures with numerical precision in the place2dTexture node’s Attribute Editor, or you can use Maya’s Texture Placement Tool to reposition textures or labels interactively.
For more information about texture positioning the place2dTexture node, see 2D texture positioning.
To position a 2D texture interactively
The place2DTexture’s Attribute Editor appears
It may be difficult to place a texture using only the manipulator. Use both the manipulator and the Attribute Editor to get the desired result.