Layers are available in $[officename] Draw, not in $[officename] Impress. Layers allow you to assemble elements on a page that are related. Think of layers as individual workspaces that you can hide from view, hide from printing, or lock.
层在 $[officename] Draw 中可用，而在 $[officename] Impress 中不可用。层可以将页面上相关的元素组合起来。可以将层作为能够在查看时隐藏、打印时隐藏或锁定的独立工作空间。