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If you have trouble starting IGB, see Troubleshooting or ask for help on the Genoviz Help Forum. BioStars. (Please include the IGB tag to ensure we'll see your question.) 

Step 2: Choose species and genome version

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To change style elements of a track, click the track label and use the Annotation or Graph tab to change to change color, track height, annotation label, amount of data shown (stack height), and other options.

See also:

• Customizing tracks
• Preferences
• Annotation tab
• Graph Tab