In the File Open dialog box, select an .idw file and then click Options.
Full When selected, checks that all referenced files resolve, are found, for the view to be presented. For files that do not resolve, you are given the option to manually resolve or skip those files.
Defer When selected, suppresses automatic update for the active drawing. Clear the check box to enable drawing updates when the model changes. An icon appears next to drawing views and models that need updating. This allows you to selectively update your drawing views.
File References