I want to use QGIS as a tool for collecting GPS-Data in the field. One use case would be simple surevy tasks where I want to store the three dimensional position of points. QGIS is working fine on the Windows 8.1 Tablet-PC and it is getting NMEA Data from an external GPS-Receiver. The position is shown on the map and I can store points (and lines) but they only contain the two dimensional positional info - so the height information is lost.
How can I QGIS make store the height info?