How about  ␣ (Unicode U+2423, decimal 9251, *open box*).   Source:
http://en.wikipedia.org/wiki/Whitespace_character >> Visible Symbol.

back in the 70's we used a ^ near the bottom of the line, but that was
when writing out code on paper was done before punching it onto cards or
paper tape.

Ed Nodland
SDdat



On Fri, Mar 14, 2014 at 6:29 PM, Alan Litchfield <a...@alphabyte.co.nz>wrote:

> Hi,
>
> The UTF-8 code for it is U+2423 and it is called "Open Box" (␣).
>
> In LaTeX you can use the \textvisiblespace{} macro.
>
> Regards
> Alan
>
>
> On 15/03/14 2:09 PM, Syed Zaeem Hosain (syed.hos...@aeris.net) wrote:
>
>> Hi, everybody.
>>
>> In my specifications, I often need to “show” a space character … for a
>> text format sample, for example.
>>
>> I usually use a fixed-width font (Consolas) for these format samples.
>> This helps to make the space character obvious, but isn’t perfect.
>>
>> Elsewhere, I have also seen the use of an underscore-like character with
>> little “upticks” at the end.
>>
>> What do you all do for this purpose? If you use a printing character to
>> denote a space, what character do you use?
>>
>> Is there a character in a fixed-width font (ideally Consolas ... I went
>> looking but did not find something convenient) that would be good?
>>
>>
>> Thanks!
>>
>> Z
>>
>>
>>
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> --
> Dr Alan Litchfield
> AlphaByte
> PO Box 1941
> Auckland, New Zealand 1140
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