You can set its appearance style for the shape, including filling, contour and shadow, or you can directly choose a preset style. The appearance style is set through the style panel:

• Supported fill modes：color、linear、radial、pattern：

  

• Stroke options：color、line width、dash style、arrow，Here are some examples of lines:

  

Diagram Boy has a built-in set of beautiful themes, each of which contains a set of preset styles. You can choose a different theme for each page of the document.