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My address book pane has disappeared from my compose, reply, send. How do I get it back?

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My address book still exists. However, when I'm using write, reply, forward, etc. it has disappeared from the pane that has been on the left side of my screen. I've tried to get it to show again, but no luck. Can someone please help me solve this? I have a huge address book. Thanks.

My address book still exists. However, when I'm using write, reply, forward, etc. it has disappeared from the pane that has been on the left side of my screen. I've tried to get it to show again, but no luck. Can someone please help me solve this? I have a huge address book. Thanks.

All Replies (3)

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Open a Write window and press F9 to turn the Contact Sidebar back on.

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Need another one.

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Need another one what?