IDA Help: set_segm_combination

Change combination of the segment
  ea      - any address in the segment
  comb    - new combination of the segment, one of sc... constants
Note: it is a macro

#define set_segm_combination(ea, comb) set_segm_attr(ea, SEGATTR_COMB, comb)
        #define scPriv     0    // Private. Do not combine with any other program
                                // segment.
        #define scPub      2    // Public. Combine by appending at an offset that meets
                                // the alignment requirement.
        #define scPub2     4    // As defined by Microsoft, same as C=2 (public).
        #define scStack    5    // Stack. Combine as for C=2. This combine type forces
                                // byte alignment.
        #define scCommon   6    // Common. Combine by overlay using maximum size.
        #define scPub3     7    // As defined by Microsoft, same as C=2 (public).