Refresh type   You can change the refresh type from AUTO REFRESH to MANUAL REFRESH, and vice versa. Use the REFRESH clause of the ALTER TEXT INDEX statement to change the refresh type.

You cannot change a text index to, or from, IMMEDIATE REFRESH; to make this change, you must drop the text index and recreate it.

Name   You can rename the text index using the RENAME clause of the ALTER TEXT INDEX statement.

Content   With the exception of the column list, settings that control what is indexed are stored in a text configuration object. If you want to change what is indexed, you alter the text configuration object that a text index refers to. You must truncate dependent text indexes before you can alter the text configuration object, and refresh the text index after altering the text configuration object. For immediate refresh text indexes, you must drop the text index and recreate it after you alter the text configuration object.