Since updating to Android 5 on my Nexus 5 I have been seeing some unusual icons, of which I don't know the meaning. El the Yin-yang icon top left and the Star icon next to wifi icon.
Is there a way to post a screen shot in this forum?
The star icon means you are in "Priority" Interrupt mode. A circle with a slash line through it in the same location means you are in "None" Interrupt mode. For details on how to use Interrupt modes, see https://support.google.com/nexus/answer/6111295?hl=en