The values of global variables can be used and changed all over the project within all scripts and libraries. However it is highly recommended to remain the number of global variables small. If global variables tend to be used in a exact project only it is advisable to keep those values in either a project specific library header or in a divide configuration file.
"g" + [Prefix]+[ShortDescription]
Letter "g" shows that the scope of the variable is global. [Prefix] is a lowercase letter that shows the type of the global variable. The rules for [Prefix] are the similar as for "Local scope variables".