> For the complete documentation index, see [llms.txt](https://docs.b2ihealthcare.com/snow-owl-authoring-platform/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.b2ihealthcare.com/snow-owl-authoring-platform/reference-sets/authoring/adding-reference-set-members.md).
# Adding Reference Set Members
Members can be added to a Reference Set from the editor or from the **SNOMED CT** and **Search View**. After adding members to the editor, the small asterisk `*` in the header indicates the unsaved changes.
**Ways to add new** **Reference Set members:**
* Click the  **Add new reference set member** button in the editor's toolbar which opens the **New Reference Set Member Wizard**. Click in the text box or enter a term to reveal the integrated Quick Search.
* **Drag and Drop** members from the **SNOMED CT Navigator** or **Search View.**
* **SNOMED CT navigator context menu**: Right-click on a concept and select
* 
**Add concept to the active reference set** or
*  **Add concept and descendants to the active reference set**.
*  **Add concept descendants only to the active reference set**. These options are only enabled when a **Reference Set Editor** is open and activated.
* **Search view context menu:** Right-click on the concept in the **Search View** and select
* **Add concept to the active reference set** to add only the selected member(s) or
* **Add all results to active reference set**
### New Reference Set Member Wizard
In case of Simple type Reference Sets the new members will be automatically added when using drag-and-drop or a Context Menu option. For other types the **New Reference Set Member Wizard** pops up requiring to specify a map target or value and other properties.
You can also specify the **module** of the new Reference Set member in this wizard. By default, the field is auto-populated with the primary module. To be able to see the module of the members, enable the Module ID column in the **Reference Set Editor** table **Preference Page**.
It is also possible to change the module of the Reference Set member by selecting the module cell and clicking on the  box to invoke the module picker.
### Validation
If a referenced component is already present in the Simple type Reference Set, a warning appears and the request is ignored.
Neither can a member with the same referenced component and map target be added twice:
###
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