NOTE: this is just my opinion and may not be shared by ultimaker...     While not explicitly open-source, the S5/S3 UI is completely written in qml and python with pyqt so, you can mod it Note: this only goes for the S5 and S3, the UM3 display is compiled C++ code that is not open.   The information is in the procedure metadata of the print procedure. so you need to change the __updatePrintJobState(self, printing_state) in the /usr/share/okuda/components/progre