Select Uncertainty propagation from the UQ study type list to perform a UQ study with uncertainty propagation. Alternatively, select Add New Uncertainty Quantification Study For > Uncertainty Propagation from the context menu for another UQ study in the same model. The advantage with the latter method is that you will start from a copy of the QoI and input parameter settings from the UQ study. Another advantage is that if the existing UQ study has a trained surrogate function, a new surrogate function will be automatically set up so that you will by default start with the method Improve and analyze, which will include your previous data used in the training. If you are adding (or removing) input parameters or QoIs, this method will not work, and you have to change Compute action to Compute and analyze.

For a full overview of the settings for the Uncertainty Quantification node, see The Uncertainty Quantification Study.