In Excel 2013, I seem to have had the default indent reference width (i.e. the width of an indent value of "1") for left-aligned text somehow increase.
When I use a previously created worksheet, I can successfully apply an indent value of "1" in a cell to get the desired indent size, i.e. an indent of a single character. Note how, in the screen shot below, the indented text is shifted to the right by one character relative to the unindented cell above it.
However, when I now create a new worksheet, an indent of "1" shifts the text to the right by three characters, as shown in the screen shot below. Larger indents are relative to this, e.g. an indent of "2" shifts the text to the right by six characters, etc. (not shown).
In both cases, you can see in the screen shots that the font in that cell (and, as far as I can tell, the font elsewhere in the worksheet) is "Courier New", font size "11". I've looked through the "Format Cells" window, the document "Options", and elsewhere, and I can't seem to find a way to control what an indent of "1" means.
Note that cell indents cannot have decimal values; they must be integers. So I can't solve this problem by, e.g., applying an indent of "0.333". But even if I could indent it fractionally, that would not satisfy me. I want to be able to control what my indents are, in part to make formatting between documents consistent, but also just more generally to feel like I'm formatting the document in a rational way.
So how can I exert control over the default indent reference width?