The Date and time format in PI System Explorer's Preview-Results pane are not displayed according to the end user's operating system date & time format defined. This is an inconsistent behavior to that of PI System explorer in general sine the application displays date & time formats according to the OS settings in all other fields.
In the attached example one can see that the start\end date & time formats displayed on the trend's X-axis are correct (comparing to local OS settings) as oppose to the ones displayed in the Preview-Results pane...
