Typeahead Seek Selection 

When a list, tree or grid has the focus, typing moves the selection highlight to the first entry in the list, the tree, or the sorted column in the grid that matches the characters you typed; each keystroke moves the highlight to the first item that matches what you have typed so far. This feature is referred to as typeahead seek.

Pausing for a half-second between characters “resets” the seek feature, so that the next character you type is treated as the first character you want to match.

Typeahead seek works in a grid only on the single column that is currently the sort column, not on all of the columns at the same time. To perform typeahead seek on a particular column, first make sure that it is the sorted column before you start typing characters.

When a grid contains a hierarchy column, none of its columns will be sortable. However, the hierarchy column is automatically treated as the sorted column for typeahead seek purposes, allowing you to use typeahead seek on it.