Figure 1 shows the Plug-in Window prepared to run the plug-in XY2Polar. The arguments are set to their default values.
The principal features of QSAS Template Language QTPL may be seen by comparing the Window with the corresponding plug-in template, XY2Polar.qtpl, which is listed in figure 2 below.
There follows a description of the principal features of QTPL and recommendations on their use.