All ds9 information in one place

You might as well start to get comfortable with using ds9. It's free, very commonly used in astronomy, and available for just about any platform.

Somewhat less coherent (or less standalone) materials

How can I make a color composite image using Spitzer and/or other data? - vintage wiki materials (look at history to see who/when edited it)

ds9 Tutorials from Luisa's official NITARP tutorial (Jan 2013):

• Part 1: ds9 overview - what is ds9, etc (10.5 min)
• Part 2: the first half of the ds9 demo - getting it started, basics of usage (19 min)
• Part 3: the second half of the ds9 demo - more advanced tips and tricks (25 min)

Tutorial from Milton Johnson from 2016:

• Starting ds9 from the command line in Windows (10 min)

ds9 Tutorials from Babar from 2012:

• Video 1: How to load and view and image in ds9
• Video 2: How to read information about your image in the information panel of ds9