LibreOffice 7.1 帮助
Specifies the background for HTML documents. The background is valid for both new HTML documents and for those that you load, as long as these have not defined their own background.
打开 HTML 文档，选择「LibreOffice - 偏好设置工具 - 选项 - LibreOffice Writer/Web - 背景」。
Click a color. Click the None button to remove a background color.