[NTG-context] Vertical space around displayed formulas

18 Jan 2017

      Hello,
has something been changed in the last few months in the vertical
spacing of displayed formulas, frames or other environments?

I am re-typesetting some presentations using the latest beta and the
content of slides (especially those containing formulas) now tends to
flow to the next page, while before it used to fit in one page.

I paste below an example, if that helps. I am using a system font,
so you may not be able to reproduce my problem without it.

Is there something I should change in my documents?

Nicola

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\setuppapersize[S6][S6]

\setuplayout[
   width=middle,
   height=middle,
   topspace=2mm,
   header=0mm,
   headerdistance=0mm,
   location=singlesided,
   backspace=5mm,
   margin=0mm,
   edgedistance=0mm,
   margindistance=0mm
]

\setupalign[nothyphenated,flushleft]

% Ocean Sunset (color.adobe.com)
\definecolor[colorone]    [r=0.251, g=0.349, b=0.322]
\definecolor[colortwo]    [r=0.612, g=0.608, b=0.478]
\definecolor[colorthree]  [r=1.0,   g=0.827, b=0.576]
\definecolor[colorfour]   [r=1.0,   g=0.592, b=0.310]
\definecolor[colorfive]   [r=0.960, g=0.310, b=0.161] %t=0.8 , a=multiply]
\definecolor[nearlywhite] [s=0.996]

% Fonts
\definefontfamily[slidesfont][serif][Avenir] [
   tf=name:Avenir Light,
   it=name:Avenir Light Oblique,
   bf=name:Avenir Heavy,
   bi=name:Avenir Heavy Oblique
]
\definefontfamily[slidesfont][sans][Avenir] [
   tf=name:Avenir Light,
   it=name:Avenir Light Oblique,
   bf=name:Avenir Heavy,
   bi=name:Avenir Heavy Oblique
]
\definefallbackfamily[slidesfont][mono][Xits][range={"0222A,"02229,"02205}] 
% ∪, ∩, ∅
\definefontfamily[slidesfont][mono][Latin Modern Mono Light][features=none]
\definefallbackfamily[slidesfont][math][Xits][range={"025C7,"27D5}] % 
WHITE DIAMOND, left-join, WHITE RIGHT-POINTING TRIANGLE
\definefontfamily[slidesfont][math][TeX Gyre Pagella Math]

\setupbodyfont[slidesfont]

% Foreground/background color
\setupcolors[textcolor=colorone]
\setupbackgrounds[page][background=color, backgroundcolor=nearlywhite]

% Header
\startreusableMPgraphic{header:background}
   fill OverlayBox
     leftenlarged BackSpace
     rightenlarged CutSpace
     topenlarged TopSpace
     withcolor OverlayColor ;
   setbounds currentpicture to OverlayBox
     enlarged max(BackSpace,CutSpace) ;
\stopreusableMPgraphic

\defineoverlay[header:background][\reuseMPgraphic{header:background}]

\define[2]\MySlide{\framed[
   frame=off,
   background=header:background,
   backgroundcolor=colorfive,
   width=\textwidth,
   align=flushleft
]{#2}}

\definehead[slide][subject]
\setuphead[slide][
   style=\ssb,
   command=\MySlide,
   color=nearlywhite,
   insidesection=\doifnot{\structureuservariable{align}}{top}\vfill,
   aftersection=\doifnot{\structureuservariable{align}}{top}\vfill,
   page=yes,
]

% Footer
\setuppagenumbering[location=]
\setupfooter[style=small, color=colortwo]
\setupfootertexts[][\userpagenumber/\lastuserpage]

% Lists
\startuseMPgraphic{itemize:main}
   save p; path p;
   p := fullcircle scaled 1.5ExHeight;
   fill p withcolor \MPcolor{colorfive};
\stopuseMPgraphic

\startuseMPgraphic{itemize:nested}
   save p; path p;
   p := ((0,-0.5)--(0,0.5)--(0.866,0)--cycle) scaled 1.5ExHeight;
   fill p withcolor \MPcolor{colorfive};
\stopuseMPgraphic

\definesymbol[itemize:main][\useMPgraphic{itemize:main}]
\definesymbol[itemize:nested][\useMPgraphic{itemize:nested}]

\setupitemize[1][symbol=itemize:main]
\setupitemize[2][symbol=itemize:nested, width=1.5ex]
\setupitemize[2][nowhite]

\setupitemize[
   headstyle=\ssa,
   headcolor=colorfive,
   afterhead={\blank[none]},
   inbetween={\blank[big]},
   leftmargin=1em,
   rightmargin=1em,
]

% Tables
\setuptables[rulethickness=0.06em]

\setupinteraction[state=start,  % make hyperlinks active, etc.
   style=\tf,
   color=colortwo,
   title={What Do You Mean, “Null”?},
   author={Nicola Vitacolonna},
   keyword={null}]

% \usebtxdataset[main.bib]
% \usebtxdefinitions[apa]
\setupcombinations[distance=3cm,location=top]
\defineframedcontent[tablebackground][frame=off,background=color,backgroundcolor=colorthree]
\setuptables[rulethickness=0.06em,frame=tablebackground]

\setupalign[nothyphenated,flushleft]

\defineparagraphs[twocol][n=2]
\setupparagraphs[twocol][1][width=.7\textwidth]

\starttext
\switchtobodyfont[17.3pt]

\startslide[title={Which Nulls?}][align=top]
   All of the above may be abstracted into three categories:

   \startitemize[packed]
     \item
     Exists, but unknown ({\bf missing value})
     \startformula
       \exists x\,\hbox{Yalta}(\hbox{Winston},x,\hbox{Churchill})
     \stopformula
     \item
     Nonexistent, not applicable ({\bf inapplicable null})
     \startformula
       \neg\exists x\,\hbox{Yalta}(\hbox{Winston},x,\hbox{Churchill}) \land
       \hbox{Yalta}_{-2}(\hbox{Winston},\hbox{Churchill})
     \stopformula
     \item
     Not known to exist ({\bf no-information null})
     \startformula
       \hbox{Yalta}_{-2}(\hbox{Winston},\hbox{Churchill})
     \stopformula
   \stopitemize

   \midaligned{\tfxx
   \starttable[|l|l|l|]
     \NC \THREE Yalta \cite[Atzeni:1993] \NC \AR
     \NC FirstName \NC MiddleName \NC LastName \NC \AR
     \HL
     \NC Franklin \NC Delano \NC Roosevelt \NC \AR
     \NC Winston \NC  UNK \NC Churchill \NC \AR
     \NC Charles \NC  NA  \NC  DeGaulle \NC \AR
     \NC Joseph \NC  NI  \NC  Stalin \NC \AR
   \stoptable}
\stopslide
\stoptext