I would like to be able to interactively change various aspects of an error bar plot (in a Qt window), such as line width/colour/marker size.
This is possible for a normal Qt plot, you can do this with the NavToolBar button that opens a Figure options GUI. There is a curves tab that displays these options for each of the plots on the graph.

However, errorbar plots don't show in the curves tab, so it's not possible to interactively set their properties. Why don't those plots show in the curves tab?