diff --git a/binarycpython/utils/grid_options_defaults.py b/binarycpython/utils/grid_options_defaults.py
index 8c99fec7d339b723b58f9be5bfecaac3938c3eb9..5f360e7b0fd54b1bebc0476d87924e31a354c0a2 100644
--- a/binarycpython/utils/grid_options_defaults.py
+++ b/binarycpython/utils/grid_options_defaults.py
@@ -1,16 +1,21 @@
 grid_options_defaults_dict = {
-    #
+    # general
     "amt_cores": 1,  # total amount of cores used to evolve the population
     "verbose": 0,  # Level of verbosity of the simulation
+    # Output dir
+    # "output_dir":
     # Custom logging
     "C_auto_logging": None,  # Should contain a dictionary where the kes are they headers and the values are lists of parameters that should be logged. This will get parsed by autogen_C_logging_code in custom_loggion_functions.py
     "C_logging_code": None,  # Should contain a string which holds the logging code.
     "custom_logging_func_memaddr": -1,  # Contains the custom_logging functions memory address
+    # Store pre-loading:
+    'store_memaddr': -1, # Contains the store object memory adress, useful for preloading. defaults to -1 and isnt used if thats the default then.
     # Log args: logging of arguments
     "log_args": 0,  #
     "log_args_dir": "/tmp/",
     # Grid variables: instructions to generate the values of the parameters
     "grid_variables": {},
+    ##
     # return_array_refs=>1, # quicker data parsing mode
     # sort_args=>1,
     # save_args=>1,