Yohkoh users may define an IDL startup routine by defining the Unix environmental or VMS logical IDL_STARTUP. An IDL startup is a file which contains IDL commands. These commands are automatically executed at startup time to allow customization of the IDL environment. If IDL_STARTUP is defined, it is executed after the Yohkoh-wide and site IDL_STARTUP files so the user values will supercede the defaults. An example of a command located in the .login file which will cause the IDL commands in /2p/morrison/idl_startup.pro to be executed when IDL starts is:
setenv IDL_STARTUP /2p/morrison/idl_startup.pro