## Change of hardware accelerator

When you open [Screen] in the control panel, the following screen is shown. (The screen is somewhat different according to version of OS or video card.)

Click "Detail" in "Property" in "Screen Property" and the following screen is shown. (The screen is somewhat different according to version of OS or video card.)

You can disable hardware accelaration of Direct3D ineffective by moving the slider of "Hardware accelerator" in the "Trouble shootings" towards "None". It seems to disable OpenGL at the same time though it is not clearly stated.