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Add "Auto Pattern Live" case after Live type load is defined in the model.
For example, create a template model of 4x4 bays and look at the LPAT1 load cases using Display > Show Loads and choose the option for Analysis Model load. Program is creating 16 patterns where each panel is loaded with Live load. 
The results is combined from 16 pattern using Range Combo. The pattern load combo is created using Range type combination which automatically include the all possible skip or pattern loading cases i.e., loading the adjacent spans, alternate span etc. to produce enveloping solution. Click here to find the details of Range combo in SAP2000 and SAFE v12 program. The final results are shown as follows:
The slab panels are currently identified based on Cartesian grid system only. In future, automatic trace of supports will be added which will help to identify panels for more complex structures.