# Reference Set Editor

For working with the Reference Set members you need to open the Reference Set in an editor where the list of members can be viewed in a table. You can open a Reference Set similarly as a concept: by double-clicking on it in the **Reference Sets View**.

The **Reference Set Editor** displays members in a table with the exception of Simple type Reference Sets. Here, a ![](/files/-M568DJWoxPZC_Gejzs_) toggle button allows switching the view between hierarchical and flat list modes.

![Reference Set Editor - view in hierarchical mode](/files/-MHHQE8m9K3kpI4pLOlf)

![Reference Set Editor – member table](/files/-MHHRk9aCZw91zafS6bv)

Click on the clock button ![](/files/-MWZYlXEgGdg2-6BKczv) to **show or hide inactive members**. This action is only available in flat list mode.

The **Reference Set Editor** allows filtering the members displayed in the Reference Set.

![Filtering Reference Set members](/files/-MHHSg3OwxG9uCOx9lDK)


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