How to change stress points in the cross section of beams in sap2000

[Roberto Llerena]

Hi!!
I need help
I wanna know how to change the stress points in the cross section in beams in sap2000 v20.
The software by default define points in the cross section and gives the stresses calculates in this points, but i need find the stresses in other points that are not defined, how can i change this points or aggregate other differents in the cross section.