How to change the ttl setting in a nikon d40?

How do i change the ttl setting in a nikon d40?

What through the lens settings?

Most of us monitor and change all our settings using the viewfinder.

What are you talking about?

What are you trying to accomplish. Your question is vague and can be answered in a variety of ways. Here's a few ways of answering your question relating to TTL flash metering.

1. You can set the flash to TTL or manual. Page 78 in your manual.

2. You can set the flash to go off at certain times in your exposure (e.g.rear curtain, red eye). See pages 34-36 in your manual.

3. Controlling the output of your flash in TTL mode can be done by adjusting the flash compensation setting. Good for doing fill flash. See page 48 in your manual.

Any of the above answer your question?