To Interactively Find and Replace Text

In the Find/Replace Text dialog, enter a search string in the Find field.
Turn on the desired find and view options.
Enter a replacement string in the Replace field.
Click Find to locate the first instance of the search string.
To replace this instance, click the Replace button. Otherwise, click the Find button again to find subsequent instances of the search string.
Note: Only text in the active model can be replaced; while text in references can be located but cannot be replaced.