If you write a word in the row under a column header, you can filter the Grid by this word in the relevant field. The way to update the filtering result (after pressing <Enter> or after any key-stroke) is defined in Options button   -> Grid -> Filter options.

You can sort by one field and filter by another one at the same time.

NOTE: When a filtering is done, being made, only the records that correspond to this inquiry are shown in the grid. If you want to view all records, just remove the filtering word from the line.