excel XLM macro sheets

An XLM macro sheet (also known as an MS Excel 4 macro sheet) is essentially a worksheet, but it
has some different defaults. More specifically, an XLM macro sheet displays formulas rather than
the results of formulas. In addition, the default column width is larger than in a normal worksheet.
As the name suggests, an XLM macro sheet is designed to hold XLM macros. As you may know,
the XLM macro system is a holdover from previous versions of Excel (Version 4.0 and earlier).
Excel 2010 continues to support XLM macros for compatibility reasons — although it no longer
provides the option of recording an XLM macro. This book doesn’t cover the XLM macro system;
instead, it focuses on the more powerful VBA macro system.