Where can I find the results of the contact stress (soil pressure) for the elastic surface foundation or the member elastic foundation displayed on the screen?
You can select the "Contact Stresses" for display below the respective navigator entry for surfaces and members.
For example, for surfaces it is sigma-z that represents the stress in the transition zone to the foundation (see picture).
The table display of results can be found in the results table 4.21 Surfaces - Contact Stresses and 4.7 Members - Contact Stresses.
These tables are reproduced in the printout report.