Where i can see my baseline program after assigning

You will not see baseline once assigned because it resides at the background. You can always open it by restoring the baseline if you need modification and maintain it back. If you just want to read the data show column start with BL? and same on Gantt Chart (Depends which one you use, project, primary, secondary...etc...)

Always copy baseline program before assigning it, so that if required, you can open baseline later on.