After you have added global file-matching patterns to the list of files to
be ignored for version management, you may wish to occasionally override the
"ignore".
Open the
Team > Ignored Resources
preference page.
To temporarily override one or more of the file-matching patterns, clear
their checkboxes.
Click OK.
Files that match the patterns you have deselected will be considered for version
control.
To permanently remove a pattern, select it and click Remove.