You do not. Column width is consistent for all cells in column A. However, you can replicate the effect, by using multiple columns and merging cells.
Variable
Column IV is not the last column in Excel 2007, as it was in Excel 2003. In Excel 2003 the last column is IV which is column 256. In Excel 2007 the last column is XFD, which is column 16384.
That depends on the version. Up to version 2003, it was row 65,536. From Excel 2007 onwards, it is row 1,048,576.
When you say column with command, you mean automatically adding a new column or autoadjusting a column?To add a column using a shortcut, you need to highlight a column/s first (short cut is Shift key + Space bar) then press your Ctrl and + Keys simultaneously.If you want to auto-adjust a column's width using a shortcut, you can use Alt + H O + I (texted with Excel 2007 version).
Letter at the top of the column.
XFD is the column label on the last column in a Microsoft Excel 2007 worksheet.
Variable
Column headings start at A. After reaching Z, the next is AA, then AB and so on. What the last column is will depend on the version of Excel that you have. Column IV, which is the 256th column, is in the versions up to Excel 2003. From Excel 2007 there are 16,384 columns and last one is column XFD.
XFD
In Excel 2003 and earlier, there are 256 columns, so the last column is IV. From Excel 2007 onwards, there are 16,384 columns, so the last column is XFD.
Each intersection of a row and column is a cell. So it will depend on which version of Excel you have There are 16,777,216 cells in Excel 2003 and earlier. There are 17,179,869,184 cells in Excel 2007 and after.
It is a single block in the grid on the Excel screen, formed by the intersection of a column and row.