To change the default operator ("All") for the full-text search in any full-text enabled field, edit the searchUI in the appropriate file (Shell4_Config.xml, Ted4_Config.xml, Fred4_Config.xml).
Example
In this example, we changed the default operator in the title field (that is enabled for the full-text search - it uses template kind="ExaleadFullText") from All to Exact. Note: the All operator is the system default, therefore, if the op property is not specified, it defaults to All.
BEFORE
<attribute path="[archiveObject.title]">
<ui mode="Normal" labelPosition="Side">
<template kind="ExaleadFullText" />
</ui>
</attribute>
AFTER
<attribute path="[archiveObject.title]" op="ExaleadExact" >
<ui mode="Normal" labelPosition="Side">
<template kind="ExaleadFullText" />
</ui>
</attribute>
The complete set of opcodes can be found here:
http://tech.teradp.com/tech/html/gn4/docs/VSdoc/frlrfTeraDPGN4CommonOpCodeClassTopic.html
Note: since build 2711, all ExaleadXXX templates are renamed to FullTextXXX, and the ExaleadFullText became FullText.