To Construct a Mesh Element From Contours

Select the Mesh from Contours tool ( Modeling > Mesh > Create ).
(Optional) If you want to constrain the mesh within a boundary, select the Expand to Rectangle check box.
Do one of the following:

Press the <Ctrl> key and select each contour.

or
Enter a data point and drag to use a selection rectangle.

or
Press the <Alt> key and click to change to a selection line.

If a selection set is used the set can be added to or removed from by pressing the <Ctrl> key and selecting or deselecting elements.
Enter a data point to preview.
If closed shapes are present, they are highlighted in blue.
(Optional) Press the <Ctrl> key and click to select the closed shapes that should remain open.
The selected shapes turn yellow and create a boundary.
Enter a data point to construct the mesh element.