THE INTERFACE
Input to PHREEQC is free format and fields are delimited by spaces or tabs. In general, the order of keywords within a simulation and, in most cases, the order of lines within a keyword are irrelevant, so the input file can be edited relatively easily. However, it is possible to introduce input errors that cause the data blocks not to be interpretable by PHREEQC and PhreeqcI. In this case, the user has to correct the errors in the line editor, or remove the erroneous keyword data block with the line editor and reenter the data through the keyword screen.
The line editor is the only way to delete an entire keyword data block, to add an END keyword between previously defined keywords, or to move keyword data blocks between simulations.
After familiarization with PhreeqcI, the line editor can be used for simple modifications of an input file or even for much of the data entry.