Emacs command to select only lines indented below a specified level

[Fred Stluka]

Ben,

Excellent answer!  Thanks!

--Fred
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Fred Stluka -- mailto:fred at bristle.com -- http://bristle.com/~fred/
Bristle Software, Inc -- http://bristle.com -- Glad to be of service!
Open Source: Without walls and fences, we need no Windows or Gates.
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On 5/23/17 6:46 PM, Ben Finney wrote:
> Fred Stluka <fred at bristle.com> writes:
>
>> On 5/23/17 4:43 PM, Ben Finney wrote:
>>
>>> The ‘set-selective-display’ command […] is bound to ‘C-x $’ in
>>> default Emacs.
>> How do I specify the number of columns when using "C-x $"?
> You will remember, from doing the Emacs tutorial when you first learned
> Emacs, that all commands have a “prefix argument” available
> <URL:https://www.emacswiki.org/emacs/PrefixArgument> that the command
> can use to modify its behaviour.
>
> So, use the prefix argument to specify the number of columns for
> ‘set-selective-display’.
>
> E.g.:
>
>      M-9 C-x $          # Indentation >= 9 disappears.
>      C-u C-x $          # Indentation >= 4 disappears.
>      C-u 1 3 C-x $      # Indentation >= 13 disappears.
>      C-u C-u C-u $      # Indentation >= 64 disappears.
>      C-x $              # All lines reappear.
>
> etc.
>
>> Same for using the command at the M-x prompt. I type "M-x" and see the
>> M-x prompt, then then type "set-selective-display" using tab to
>> autocomplete it. But I can't then type a column number after a space
>> or in parens or anything. What am I missing?
> Time to work through the Emacs tutorial again; ‘C-h t’ :-)
>