dummyButtondummyButtonFor itembox when there are high number of rows per page selected it's often hard to remember to what column does each particular cell relates,as column headers where not visible when scrolling to the bottom of page.
With this feature the itembox columns are always visible now during vertical scroll so it is easy to determine what column value you are viewing or editing now. The filter row is also moves together with header, when toggled.
This feature is available when horizontall scroll mode for itembox is enabled ( controlled through the application setting).