Custom Box Layout header and collapse

Question

Hello everyone, Im new to Appian, Is it able to custom a box layout like this. I found that field style:"STANDARD" could be the same but I want it have to be white one. Can anyone help me?

Stefan Helzle · Answer

Did you try to just set the Style to the white?

Prasanta Paul · Answer

Please check the color of box layout in the style section.

Soma · Answer

Please try the below code 
 
 {
 a!horizontalLine(),
 a!boxLayout(
 label: "Remarks",
 labelSize: "SMALL",
 isCollapsible: true,
 style: "#ffffff",
 showBorder: false(),
 contents: a!richTextDisplayField(
 value: {
 a!richTextItem(
 text: "Remark",
 style: "STRONG"
 ),
 char(10),
 a!richTextItem(
 text: "Need to check customer claim history"
 )
 }
 )
 ),
 a!horizontalLine(),
 a!boxLayout(
 label: "Document",
 labelSize: "SMALL",
 isCollapsible: true,
 style: "#ffffff",
 showBorder: false()
 )
}