# [NTG-context] What's the difference between \dontleavehmode and \leavevmode?

Hans Hagen pragma at wxs.nl
Thu Aug 18 23:48:34 CEST 2016

```On 8/18/2016 8:14 PM, Henri Menke wrote:
> Hans, Wolfgang,
>
> thank you for your speedy reply.  However, I still do not know the difference between \leavevmode and \quitvmode.  Could you please elaborate?

simple explanation: \quitvmode checks if it's in h mode already and
doesn't do redundant mode switching (which involves injecting
indentation boxes)

> Cheers, Henri
>
> On 08/18/2016 06:39 PM, Hans Hagen wrote:
>> On 8/18/2016 5:23 PM, Henri Menke wrote:
>>> Dear list,
>>>
>>> could someone please explain what is the difference between \dontleavehmode and \leavevmode?
>>>
>>> Internally, I also stumbled upon \quitvmode.  Is this a synonym for \leavevmode?  It seems to be primitive.
>>
>> \leavevmode is kind of useless as it can interfere in spacing so we always used \dontleavehmode in context (a macro) that later was added as primitive \quitvmode to luatex
>>
>> You sometimes need \dontleavehmode to make sure you enter hmode (esp when you start a paragraph with a group or boxed stuff)
>>
>> (the only two places in context where \leavevmode is used is in rather plain macros that get overloaded later)
>>
>> Hans
>>
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