I use my browser extension:
https://bitcointalk.org/index.php?topic=5224821Otherwise (and the way I did it before the extension) I have a template saved as a text file, so I would copy-paste that, and then copy paste relevant bits from the feedback page:
[table]
[tr][td] [/td][td]__NAME_GOES_HERE__[/td]
[td] [/td][td]__DATE_GOES_HERE__[/td]
[td] [/td][td][url=__REFERENCE_URL_GOES_HERE__]Reference[/url][/td]
[td] [/td][td][color=red][b][i]__FEEDBACK_TEXT_GOES_HERE__[/i][/b][/color][/td][/tr]
[/table]
This is for negative trust. The color/b/i tags would have to be changed for neutral and positive (just "i" for neutral and just "b" for positive).