add edit subjects for recruiters and conductors

source/faqs.rst

@@ -7,3 +7,17 @@ How can I contact subjects by pseudonym after the study is finished?
 Finding subjects by pseudonym is no longer possible once the study has
 finished. If you need to contact a subject after the study is finished we
 recommend to :ref:`resume the study <study-finish>` temporarily.
+
+
+How can I edit subject data as recruiter or study conductor?
+------------------------------------------------------------
+
+Recruiters and conductors are only allowed to access subject data of 
+participants within study context. Yet, this workflow allows to edit the subject 
+data of them:
+
+- Search for the participant via **Subjects** on the home screen.
+- Select either **Recruitment** or **Execution** (whichever is applicable) in 
+  the **Matches** list to go to the subject details view.
+- Click on **Update data** and select appropriate categories that need to be 
+  edited. Edit and save the forms accordingly.