The record viewer shows the contents of the selected record. Text, RTF, and RTFD records can be edited directly in the viewer. EagleFiler knows how to display many different kinds of files. If it does not natively understand a file’s format, EagleFiler uses Quick Look to display a preview of the file.
There is also a tags bar at the bottom of the viewer for assigning or unassigning the tags of the current item.

While the record viewer has focus, you can press Command-Delete to delete the current record(s).
Control-click on a selected word or phrase to set that phrase as the tag, filename, from, or title.