[TYPO3-ttnews] Preview hidden articles

[Jeroen Visser | ROQUIN E-Solutions]

Hello,
I need to preview hidden articles from the backend after clicking 'save and show'. Being admin it works. Changing the login to editor I get the 
message like "no news_id inserted".
Can someone tell which rights to set so my editor can preview hidden articles? Thanks in advance.

ps: my TSconfig: tx_ttnews.singlePid = 88


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Kind regards,

Jeroen Visser