Switch between Paper Space and Model Space 切换图纸与模型

Modify objects in paper space, you need to switch to model space.

要在图纸空间修改对象就必须转换成模型空间

Double-click in the viewport 视口内双击
Model space icon displayed to indicate that the current status is model
模型空间符号显示

Click GridModel icon 点击显示图形栅格

Grids turn off in model 图形栅格显示关闭

Double-click outside viewport to return back to paper space 

双击视口外转换回图纸空间
Model space icon disappear 模型空间符号消失