Welcome to the SU Community Forum. Your post should have been submitted under the pinned “Welcome to Our Forums” thread under the SketchUp category. You should also offer a bit of information about yourself including your experience level and the kinds of things you do or want to do with the software. Also please edit your profile by completing the requested info about your computer setup and the version of SketchUp being used. (What graphics card is named drawing for instance?) This makes assisting you much easier as it helps pinpoint issues when you ask questions.
I am taking the liberty of placing this post where it belongs. You can provide the additional information by editing your post. To edit click the pencil icon at the lower right in the reply box and modify your previous post as desired.