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• Choose Graph-based from the Select by drop-down in the Attributes tab of the Selection / Filtering section of the control panel 
• Click the check box for 8 to select cluster 8
• Click Classify selection 
• Name the cells Tfh cells
• Click Save 
• Choose Classifications from the Color by drop-down menu
• Click Clear selection 
• Click Clear filters to return to the full data set
• Click Apply classifications 

Classify cells using Scatter plot

An alternative method to clustering and UMAP/t-SNE for classifying cells is using a scatter plot to visualize the expression of key marker genes or proteins. This approach is more effective with CITE-Seq data than gene expression data alone as the protein expression data has a better dynamic range and is less sparse. 

• Click the Merged counts data node
• Click Exploratory analysis in the toolbox
• Click Scatter plot
• Click Finish to run 
• Double-click the Scatter plot task node to open it