Continuing the discussion from Welcome to our forums! Please introduce yourself :
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The looks like the graphics card is having a bit of an issue drawing the selection box. My first recommendation is to update the driver for your graphics card. If that doesn’t do the trick, try disabling fast feedback in your graphics card settings:
- Open the “Window” menu. (Open the “SketchUp” menu.)
- Click “Preferences”.
- In the left pane, click “OpenGL”.
- In the right pane, clear the “Use Fast Feedback” check box.