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1. Open a Study Details page.
   

   

2. In the Visualize and Select area, click one of the entities.

   Info
   title Study Hierarchy
   The hierarchy of entities for studies according to the ISA-TAB standard is as follows, from less granular to more granular: Source > Protocol > Sample

   For example, click Source. Metadata for that source appears.

   Info
   Follow this same procedure if you want to filter on Protocol or Sample instead of Source.

   
   

3. From the Source Name list, click the arrow to open the list of values. Each value is a Source Name from the study file, which in this case is s_mrna.txt.
   
4. Click one or more values in the list to select them. Each value appears immediately below the Source Name box. To clear a selection, click the value again.
   
5. Click Filter Results.
   The Source Count reduces from the 40 original values in the unfiltered study file, s_mrna.txt, to the 3 three selected in this procedure.
   
6. Options you have at this point include continuing to explore this data set, downloading the metadata of the 3 three values you selected, downloading the selected data of the 3 three values you selected (which includes the metadata), or clicking Clear Filters to filter a different entity.

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