Read molecules in PDB format.
To remove files from the list select the file and press the 'Delete' key.
To select all files in the list press Ctrl-A.
To add all files that match a pattern, using an asterisk (*) into the dialog "File Name" field. Press return, and the file filter will show up in the "Files of Type" drop down, then press Ctrl-A to select all of the files that show up with that filter. The list of files will then show up in the "File Name:" field, space delimited with double quotes around each file name. Then press "Open" to load all of those files.