Optimize a PDF with large images that do not need to be reprinted exactly.

gs -sDEVICE=pdfwrite -dNOPAUSE -dBATCH -dCompatibilityLevel=1.4 -dPDFSETTINGS=/ebook -sOutputFile=<newfile.pdf> <infile.pdf>

Pink Lightning Spotify Icon

This icon which resembles a pink lightning bolt on a rectangle or torn paper signifies that this track is local on your computer, but the file has DRM, so Spotify is playing a matching track from its libary instead.