See documentation for RAM models summary here: umxSummary.MxModel.
View documentation on the ACE model subclass here: umxSummary.MxModel.ACE.
View documentation on the IP model subclass here: umxSummary.MxModel.IP.
View documentation on the CP model subclass here: umxSummary.MxModel.CP.
View documentation on the GxE model subclass here: umxSummary.MxModel.GxE.
umxSummary(model, ...)mxModel whose fit will be reportedloadings.MxModel,
  mxSE, umxAPA,
  umxGetParameters,
  umx_APA_pval, umx_aggregate,
  umx_print, umx_show,
  umx_time, umx