Commands:
File > Import > Ion Groups...

Chromatographic ions are characterized by their m/z value and retention time.

Ion Groups
The command File > Import > Ion Groups... allows to import text files representing groups of chromatographic ions. A text file should contain a list of [m/z (separator) retention time [min]] values. There could be additional columns which will be ignored. The Import Window allows to choose the columns that represent the m/z and retention time values amongst the columns detected. Individual ions can be added or removed after import.