The default line indentation in MS Excel is:

In Microsoft Excel, when you apply indentation to cell content, the default line indentation is typically 0.5 units (often points or characters, depending on context). This small, predefined increment shifts the text or numbers slightly to the right within the cell. Indentation is a formatting tool used to improve readability, create visual hierarchy, or align content within cells without merging cells or significantly altering column widths. Users can adjust this default value through the "Format Cells" dialog box, under the "Alignment" tab, to achieve different visual effects.

• 1, 0.75, and 1.25 are all valid indentation values that can be manually set by a user. However, they are not the initial default setting provided by Excel. The default is specifically chosen to offer a subtle visual offset.