Create Stroke Tool

To add a stroke to a node, click the Select Node Tool then click the node you want to change.  Click the Create Stroke Tool  and a dialog box like the one shown below will appear.  Click the Stroke check box.  Choose the color you want from the swatches or the HSB and RGB color pickers or click the Sample Color button and choose a color from the active template.  Use the slider on the right side of the dialog box to adjust the opacity if necessary.  Click the gray circle with the white x in the top right corner of the dialog box to apply your change and exit the dialog box.