The Custom report supports Vizlib Templates now, so you can pick the look and feel and apply it to with one click. You can find template settings in the property panel under Templates (Figure 1).
Figure 1: Templates
To use templates in Custom Report, click on View Templates to open the template screen (Figure 2). You'll see a list of available themes, so you can choose the theme you want and it'll be applied right away. If you need to change the template theme, select one and apply the changes with one click.
Figure 2: Using Templates
If you find you need to make more changes to the template theme, you can use the settings in the Appearance tab to set the look and feel you want.
If you'd like to know more about managing or working with Vizlib Templates, please see our article here.