Tianzheng 8 is invisible in model space.

Personally, I think what you said is more likely to be marked in the layout space. Of course, it is also possible that you can't find the location of the diagram in model space. Let me talk about the solution:

1. dimensions are directly marked in the layout (drawing) space: this is not uncommon. After switching to the layout space, have you tried to select those dimensions to see if you can select them directly in the layout?

When doing this, make sure that your mouse is in the layout space interface and not in the viewport box.

2. If you can see the size in the layout space, but you can't select the size in the layout space after the first step, it means that you should mark the size in the model space, so you can double-click the mouse in the viewport in the layout first, and then use the mouse to select the size to see if you can choose it. If it is selected, it will clearly tell you that the entity exists in the model space.

3. Then you say that when you enter the model space, you can't see the label. It's hard to explain. It may be due to the relationship between some layer or size block attributes that the model can't see but the layout can see. As long as you confirm that the label is in the model space, you can open the layer controller, open all closed and frozen layers, and naturally you can see the displayed label.

4. Finally, explain why it is possible that you didn't find the position of the paper displayed in the layout corresponding to the model space: if this is my guess, then you may still not find the label you said according to the previous practice. This situation is actually that the painter is unkind, that is, the primitives you see in the layout are not the corresponding diagrams displayed when you switch from the layout to the model interface. It is also simple to confirm this. After the layout viewport enters, you can draw anything at will, and then cut back to the model to see where you draw something. If you don't see what you drew in the model space, congratulations, you have met what I said. The specific solution steps are as follows: enter Z carriage return and E carriage return in the model space, so that all primitives can fill the window, and then you can carefully find out where what you just drew, which may be difficult to find. You can search carefully by zooming the scroll wheel, or you can filter by box selection. Anyway, you can find it in this file.