first step:
First draw a simple (closed) two-dimensional graphic:
The second step:
Change the viewing angle, for example to
The changed perspective:
third step:
Select the closed graphic border, use the key combination "ctrl + shift + E", and then drag the selected graphic to achieve stretching.
Here the key combination needs to enter a command or parameter ("extend"), and then select the border
At the beginning, the default possible dimension contour map is here. If you need to modify it as a filled entity, you can directly modify it in the "View" column.
The effect after changing to the concept picture
