What trigger should I use if I want to keep record amendment log?

I am a newbie to Oracle forms, I would like to raise a simple question here ... hope you won't mind ... I have a form interface which accepts user input to record attributes for an object (e.g. personal information of a user). Now, because the importance of data, I was required to write log records in a journal table for changes made on the data. What trigger am I recommended to place and use?
Thanks for any replies!

Duncan, thanks for your reply first. However, I have two queries:
1) Any generic event state to indicate change of record rather than 'POST-INSERT', 'POST-UPDATE' and 'POST-DELETE'?
2) Given that I use the 'POST' event, how can I get the pre-update value? (My log record is supposed to record the before-update value)
Thanks for your reply!

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Ziatron wrote:
... I am shocked and horrified to learn that the latest iMovie does not even set chapter markers!
.. I am looking into 2 possibilities, Adobe Premiere elements 12, or.........Final Cut Pro X.
The final result of my work is almost always a DVD. ...
... I do not need any of the high-powered affects capability that Final Cut Pro X possesses. My “movie-making” is mostly confined to simple editing (the old iMovie 06 did all I needed).
to turn perspective for a second by 180°:
Why do you want to switch to a new editor anyhow?
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Note down the G/L accounts you are posting.
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What trigger should I use if I want to keep record amendment log?

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