Xin chào @yesterday55555,
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Roman Zhelezniak
Robot Evangelist & Passionate Civil Structural Engineer
No. That is not the things I want to.
I means in the tab Plan view but shows 3D views. I could not get the plan back to defaut
Please attach the model and the corresponding screen capture when you have such situation again. In general the change of the structure type from a Building to a Shell and back to a Building should solve it.
If I managed to answer your question(s) press the Accept as Solution button please. This will help other users to find solution(s) much faster. Thank you.

Here is the problem, bro. I am sorry I do not have the file now. But when I open the file others computer, there is not problem. I think somethings the issue is in my setting computer with robot structural system.
That problem is not showing when I open new file., but the file I have been modeling.
I have tried to make the file to the setting defaut, but I could not do that.
Actually you are in the Plan (2D XY) view which is indicated by the description of the global axes and the red rectangle which indicates the fixed plane position. I can't tell why you can't see the Plan view (perhaps it will be just enough to close Robot and open it again as it seems to be just a display issue) but it is such.
If I managed to answer your question(s) press the Accept as Solution button please. This will help other users to find solution(s) much faster. Thank you.

ok. I do not know why it has got the problem. But It maybe need to closed then open to fix it.
Thanks
I've literally just started using robot and I can't even find the icons on the top left side of the screen with view and plan. Tried restarting it several times and still no luck. I mean I created grids and storeys but can't actually go to the plan view of each storey.