The entry applications use a library from a third party to display this box and we use a virtual list box. In other words, we do not know how many records there are, we only get one screen of records at a time from the index file.
Most users don’t want to wait for us to go and read every record before displaying the list. Placing the thumb in the middle is functional. You can click on the area above the thumb to accomplish a page up. Click below the thumb for a page down. You can click on the arrows on either end to move one record at a time. You can also grab the thumb and move it up or down to quickly scroll through the records. When you see the records that you want to display, simply let go of the thumb. The thumb will return to the middle, but the rows you have displayed will remain in the window.
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