Some time ago I created an Excel file that utilized macros. The file was a
Village Software template that I used for invoices.

Today I tried to open this file, and could not. Reason: my system informed
me that my "security levels" would not allow the file to be opened.

1: How do I alter/change the security levels?
2: What is the preferred way to open this file?

Any help would be appreciated. This is my first time to use this service.