你不能对树进行编辑，但是你可以选择其中的对象并在右边面板的属性列表中编辑它的属性。
You can't edit the tree, but you can select an object within it and edit its properties in the properties list in the right pane.
当材质和纹理包含定制属性在材质编辑器中被选择时，在这些属性中被定义的展卷栏将出现在材质编辑对话框的末端。
Rollouts defined in these attributes will appear at the end of the Mtl Editor dialog when the material or map containing the custom attributes is selected in the Mtl Editor.
例如，如果在控件上定义了自定义类型的属性，就可以提供一个自定义用户界面或类型编辑器，使用属性浏览器来编辑该属性的值。
For example, if you define a property of a custom type on a control, you can provide a custom user interface, or type editor, to edit the value of that property using a property browser.
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