Changing advanced search user settings when attaching files

By default, the basic search function is what you’ll see when you're creating or responding to a mail and want to find files to attach to it. However, if the default search is producing too many results, you can set up Mail to use the advanced search settings. You do this by modifying your preference settings from Setup/Preferences. The two graphics below show results of the same search using the default and advanced search functionality. 

Changing your search settings

1. Click Setup
2. Under Configuration, click Preferences.

3. Scroll to Personal settings, Documents, See full search window for attaching documents from register.
4. Clear the checkbox in the Use Default Setting column.
5. Select the checkbox in the Setting column.
6. Click the Save button.