Examining images with ds9

Things you should type in the terminal window are shown in bold Courier font.
ds9 (v7.5) drop-down instructions are shown in italic font with "-->" to indicate submenuing

Step 1: Set up

Step 2: Examining an individual zero image

Step 3: Compare to a nightly master zero
Helpful Tip: if you accidently generate unwanted regions (green circles), single-left-click them to activate them, then hit delete key to delete them.

Step 4: Examine a flat field image:

Step 5: Examine an object frame
Step 6: Quick radial profiles: