How to use pre-built layouts?

Please do the below change in the body element at app/Views/partials/body.php file. ex: <body data-layout-size="boxed">

Color Scheme:
image data-bs-theme="light"
image data-bs-theme="dark"
Topbar Colors:
image data-topbar="light"
image data-topbar="dark"
sidebar Colors:
image data-sidebar="light"
image data-sidebar="dark"
image data-sidebar="brand"
Layout Width:
data-layout-size="fluid"
data-layout-size="boxed"
Layout Position:
data-layout-scrollable="false"
data-layout-scrollable="true"
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