After you simulate your model using embedded types and compare the floating point and fixed-point behavior of your system, determine if the new behavior is satisfactory. If the behavior of the system using the newly applied fixed-point data types is not acceptable, you can iterate through the process of editing your proposal settings, proposing and applying data types, and comparing the results until you find settings that work for your system. You do not need to perform the range collection step again.
If you do collect ranges after you apply proposed data types, the newly applied data types will be locked in to your model. Subsequent proposals will only rescale the specified data types, and you will no longer be able to easily propose and apply new default data types.
To explore new default data type settings after collecting ranges, open the Model
Explorer and manually set the data types in your system under design to