This is how the viewports should look like.

这视图应该像这样。

youdao

Click the 3d object panel and change your viewports to 'quad'.

单击3d对象面板，并切换你的视图为' quad '。

youdao

The Viewports are your window into the worlds you create in Unreal.

视窗是你欣赏你所创建的虚幻世界的窗口。

youdao