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Setting Preferences 
Using this option, you can set:
· External merge/diff tool preferences
· File extensions with known content
· A list of resource name patterns to be excluded from version control.
The DTR perspective is open in the eclipse IDE.
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1. In the menu, choose Window ® Preferences.
The Preferences dialog box appears.
2. To set the external diff and merge tools, choose Team ® DTR Preferences.
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To set the file extensions with known content, in the menu chose Team ® File Content.
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To set the list of resource name patterns to be excluded from version control, in the menu chose Team ® Ignored Resources.
