Never heard of a sharpness setting for an lcd monitor. I have the 2690 (first gen) and have never seen this setting. How do you access this?
You need to get into the factory settings - which from memory you hold down the input button, whilst turning on the monitor - then push the menu button to access it. The Sharpness setting is in there.
The original posters question is a good one - I dont know the answer however. Seems to be trying to guess what sharpening to apply for someone elses monitor when its an unknown entity is folly.
In terms of how to set sharpness correctly on any display device - you need to use a test pattern (such as this Test Pattern
) and look for edge halos. When you see them you know you have applied too much sharpening with the monitor controls. That is the correct way to do it - but I dont know anyone (myself included) with a 2690 Wuxi monitor who has actually changed the default setting.
Its very easy to actually apply to mush monitor sharpening - which is a bad thing as it obscures fine detail.
Unless there is very good reason I would leave the 2690 at factory default. I find images properly sharpened on my 2690 looks ever so subtly softer on my 17" mac book pro - but its nothing to worry about.