Sets the Rotation degree around the X-axis, i.e. in the Y direction for 3d charts (between -90 and 90 degrees). The property matches with the 21.2.2.157 rotX (X Rotation) item in ECMA-376 and with the \"Y Rotation\" option in PowerPoint 2007+. Write int8_t....X(int8_t) method Sets the rotation degree around the X-axis,... i.e. in the Y direction for 3D charts (between -90 and 90 degrees)...