Result values for deformations, internal forces, stresses, and so on, can be displayed on the isolines.
More About RFEM 6:
http://www.dlubal.com/rfem
More Features of RFEM 6:
https://www.dlubal.com/en-US/support-and-learning/support/product-features?family=rfem-6
More About RSTAB 9:
http://www.dlubal.com/rstab
More Features in RSTAB 9:
https://www.dlubal.com/en-US/support-and-learning/support/product-features?family=rstab-9
Download the free trial versions and get to know RFEM 6 and RSTAB 9: