| RFOURR | Option | Code | Arg | Def | |
| data set number | ds | n | 1 | ||
| print control | pr | n | all | ||
| sort order s/m/f | hkl | from bdf | |||
| hlk | |||||
| khl | |||||
| klh | |||||
| lhk | |||||
| lkh | |||||
| reflection signs | ph | positive h only | from bdf | ||
| pk | positive k only | from bdf | |||
| pl | positive l only | from bdf | |||
| A and B threshold | th | t | phase if A or B> t | 0.005 | |
| Fcal threshold | ft | q | phase if Fcal> q Fo | 0 |