If you haven’t already seen it, the spectra viewer at FPbase.org has recently been rewritten from scratch. It is now faster and more customizable with a bunch of new features including SVG/PNG/PDF/CSV export, URL sharing (i.e. arrange the viewer exactly how you want it and then send a URL to share it with someone else) and fast entry with keyboard shortcuts. Works on mobile devices…
full documentation available here:
As before, you can save the optical configuration on your microscope for a dedicated spectra viewer www.fpbase.org/microscopes/ (note, however, the dedicated microscope spectra viewer has not yet been updated)