Unitech PA950 - Manual (Page 179)

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2. Tap Signatures.
3. Select an account for which you want to create or change a signature.
4. Select Use signature with this account if the check box is not already
selected.
5. Select Use when replying and forwarding if wanted.
6. Enter a signature in the box.
To stop using a signature, clear the Use signature with this account
check box.
You can use a different signature with each account.