support reaction for a model with response spectrum load cases

hello,

can anyone tell me how to extract support reactions with sign (+/-) in a response spectrum model.

For example, primary load case has SL+x. The civil designer needs SL-X, but since response spectrum load case uses modal super position, my values are absolute values.

so if i give a combination having -1 as a factor for seismic load +X case, my reaction is all in negative.

 can anyone help!

thanks