File size
 

I have a file that contains several macros with it. When I open it, I got the
message to enable or disable the macros (Due I need the macros, I choose
enable). After using the macros and saving the file, file size is increased
greatly. Closing the file and re-opening but now with the macros disabled,
doing nothing and saving the file, size is reduced!

Can you tell me why this is happening?