how to reduce \lineskiplimit in ConTeXt grid layout
As you know, in plain TeX, \lineskiplimit tunes the vertical glue algorithm by specifying the minimum amount of space between the bottom edge of one line and the top edge of the following line. But in ConTeXt, it appears that \lineskiplimit is set to zero, at least in grid mode. We're using grid mode, and we have some occasional high ascenders, e.g. capital letters with diacritics on top. We have bodyfont size 8.1pt, and interlinespace = 9.3pt. We realize this is less than the recommended ratio of 1.2. Understandably, when those tall characters occur, we sometimes get a blank line above them. It looks like the \lineskiplimit would be violated if the 9.3pt interlinespace were enforced, so ConTeXt adds some space (analogous to \lineskip in TeX?). But since we're on a grid, more space has to be added in order to conform to the grid. All that makes sense, but we would like to be able typeset the lines closer together, and judge for ourselves whether it looks too bad. (When we used to typeset the same text at 8.1pt/9.3pt using mkii, blank lines did not occur.) Is there something similar to \lineskiplimit that we can tweak? I've been reading section 5.5 Line Spacing in the context ref manual, but I don't see anything there about changing a threshold analogous to \lineskiplimit. I tried setting \lineskiplimit=-2pt, but that caused a worse problem: a blank line across both columns, instead of just one. Thanks, Lars Version: mkiv luatex in Tex Live 2013.
On 11/15/2013 9:49 PM, Lars Huttar wrote:
As you know, in plain TeX, \lineskiplimit tunes the vertical glue algorithm by specifying the minimum amount of space between the bottom edge of one line and the top edge of the following line.
But in ConTeXt, it appears that \lineskiplimit is set to zero, at least in grid mode. We're using grid mode, and we have some occasional high ascenders, e.g. capital letters with diacritics on top. We have bodyfont size 8.1pt, and interlinespace = 9.3pt. We realize this is less than the recommended ratio of 1.2.
Understandably, when those tall characters occur, we sometimes get a blank line above them. It looks like the \lineskiplimit would be violated if the 9.3pt interlinespace were enforced, so ConTeXt adds some space (analogous to \lineskip in TeX?). But since we're on a grid, more space has to be added in order to conform to the grid.
All that makes sense, but we would like to be able typeset the lines closer together, and judge for ourselves whether it looks too bad. (When we used to typeset the same text at 8.1pt/9.3pt using mkii, blank lines did not occur.) Is there something similar to \lineskiplimit that we can tweak? I've been reading section 5.5 Line Spacing in the context ref manual, but I don't see anything there about changing a threshold analogous to \lineskiplimit.
I tried setting \lineskiplimit=-2pt, but that caused a worse problem: a blank line across both columns, instead of just one.
you can try to choose a more strict grid snapping method (see spac-ver.mkiv line 1375 etc ... some methods have tolerance, some snap always ..) Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------
On 11/15/2013 3:54 PM, Hans Hagen wrote:
you can try to choose a more strict grid snapping method (see spac-ver.mkiv line 1375 etc ... some methods have tolerance, some snap always ..)
Thanks, I will try that. In the meantime, here is a MWE: \usemodule[simplefonts][size=8.1pt] \setmainfont[Gentium Book Basic] \setuplayout[grid=yes] \starttext \section{Small interlinespace} \setupinterlinespace[reset,small] \input knuth {\bf \color[red]{Éwé}} \input knuth \section{9.3pt interlinespace} \setupinterlinespace[reset,9.3pt] % Notice the blank line that appears above Éwé: \input knuth {\bf \color[red]{Éwé}} \input knuth \stoptext
On 11/15/2013 10:07 PM, Lars Huttar wrote:
On 11/15/2013 3:54 PM, Hans Hagen wrote:
you can try to choose a more strict grid snapping method (see spac-ver.mkiv line 1375 etc ... some methods have tolerance, some snap always ..)
\setuplayout[grid=tolerant]
Thanks, I will try that. In the meantime, here is a MWE:
\usemodule[simplefonts][size=8.1pt]
\setmainfont[Gentium Book Basic]
\setuplayout[grid=yes]
\starttext
\section{Small interlinespace}
\setupinterlinespace[reset,small]
\input knuth {\bf \color[red]{Éwé}} \input knuth
\section{9.3pt interlinespace}
\setupinterlinespace[reset,9.3pt]
% Notice the blank line that appears above Éwé:
\input knuth {\bf \color[red]{Éwé}} \input knuth
\stoptext
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-- ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------
On 11/15/2013 3:54 PM, Hans Hagen wrote:
you can try to choose a more strict grid snapping method (see spac-ver.mkiv line 1375 etc ... some methods have tolerance, some snap always ..)
Hans
\setuplayout[grid=tolerant] did the trick. There are no blank lines, and the lines on the grid Awesome! Lars
On 11/15/2013 5:29 PM, Lars Huttar wrote:
\setuplayout[grid=tolerant] did the trick. There are no blank lines, and the lines on the grid
I meant to say, the lines in the left and right columns align with each other perfectly.
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