You can easily change the model background color.

1. On the View tab, click Color theme.
2. Select one of the available background color options.

   Option	Example
   For white background in all model views: Light	The grid color is adjusted according to the background color. Grid line labels are set to black.
   For black background in all model views: Dark	The grid color is adjusted according to the background color. Grid line labels are set to white.
   For the default gradient background in all model views: Tekla default	The grid color is adjusted according to the background color. Grid line labels are set to black.
   For your own background color in all open model views: Advanced	Use the XS_​BACKGROUND_​COLOR1, XS_​BACKGROUND_​COLOR2, XS_​BACKGROUND_​COLOR3, and XS_​BACKGROUND_​COLOR4 advanced options to set the background color. Use RGB values on a scale from 0.0 to 1.0. You can control the color of each corner of the background separately. To use a single-colored background, set the same color code for all four corners of the background. For example, for green background color, set the advanced options to 0.1 0.6 0.6 0.5 0.9 0.5 0.1 0.6 0.6 0.5 0.9 0.5. Click OK to save the changes. Close and reopen the view to see the changes.

3. If you want to change the drawing background color to black, use the advanced option XS_​BLACK_​DRAWING_​BACKGROUND.