...

To run SVD CellPhoneDB task, 

• Click a single cell countsa Normalized counts data node
• Click the Exploratory analysis section in the toolbox
• Click SVDClick CellPhoneDB

The GUI is simple and easy to understand. The SVD dialog is only asking to select the number of singular values to compute (Figure 2).  By default 100 singular values will be computed if users don't want to compute all of them.  However, the number could be adjusted manually or typed in directly.  Simply click the Finish button if you want to run the task as default.

...