
You may enter any or all of these options:
    I - Ignores case when doing search
    R - Reverse search; search toward start of file
    G - Do global search/replace, don't stop at first occurrence
    C - Confirm before each replace string
    
You may use the keys to edit the options:    
    Enter - confirm entry and begin search/replace
    HOME - go to beginning of entry
    END  - go to end of entry
    INS  - toggle insert mode
    DEL  - delete character under cursor
    Left arrow/right arrow - move cursor left and right
    Backarrow - delete character before cursor
    
    ESC - cancel and return to edit mode
