4-CAIVS-user-guide/4.1-Purpose.md

@@ -7,9 +7,10 @@ Various output formats are supported for data readers of visualization
 tools like
 [IDL](https://www.l3harrisgeospatial.com/Software-Technology/IDL),
 [VisIt](https://wci.llnl.gov/simulation/computer-codes/visit) or
-[ParaView](https://www.paraview.org/). The CAIVS user interface allows
-to individually select physical variables contained in a NIRVANA
-snapshot for output. A user can also define own variables derived from
+[ParaView](https://www.paraview.org/). 
+
+Physical variables contained in a NIRVANA
+snapshot can be individually selected for output in the CAIVS user interface. A user can also define own variables derived from
 the imported snapshot variables. Different options exist to operate on
 the input mesh before ouput data is produced. For instance, data
 conversion can be restricted to a user-defined subdomain or, to name a