How do I specify the Mk model (Markov k model; Lewis, 2001) for my morphological data?
Short answer: Any data of type Standard (and Restriction) is automatically assigned the Mk model when data is executed in MrBayes. Things to consider A couple of parameters are applicable to a data partition with the Mk model, and the use of those are potentially important. Below are examples for data type Standard. See Help Lset and the MrBayes manual for more info on data type Restriction.