.FM3 File Extension
- Developer by: IBM
- Category: Settings Files
- Format: Binary
What is an .FM3 file?
.FM3 is Lotus 1-2-3 Spreadsheet Format File
File created by older versions of the Lotus 1-2-3 spreadsheet software; contains the display formatting for a .WK3 worksheet; can include formatting data for cells, borders, fonts, shading, and other display elements; can be opened by some older versions of Microsoft Excel.
Even though Lotus 1-2-3 separated out the formatting information for some spreadsheet files, recent spreadsheet applications do not use this convention.