Given the following code:
\enableregime [utf]
\mainlanguage [en]
\definepapersize[sheet][width=1280px, height=960px]
\setuppapersize[sheet][sheet]
\setupexternalfigures[directory={img,
/home/ubuntu/EGU2016-Presentation,
/home/ubuntu/ConTeXt/img}]
\usemodule[simplefonts]
\setmainfont[Adventor][expansion=quality,protrusion=quality]
\setupcolors[state=start]
\definecolor[faimsblue][h=1B3E93]
\definecolor[faimsorange][h=F68E1E]
\setuphead[section][placehead=yes, page=yes, number=no, align=middle, style={\setupbodyfont[40pt]}]
\setuplayout[
backspace=.01\pagewidth,
header=0pt,
footer=.02\pageheight,
topspace=.185\pageheight,
cutspace-.1\pagewidth,
width=.87\pagewidth,
height=.798\pageheight,
bottomspace=.8cm,
bottom=12pt
]
\setuppagenumbering[location=]
\setupinteraction
[page=yes,
color=faimsblue,
contrastcolor=faimsorange,
menu=on,
state=start]
\setupsubpagenumber
[way=bytext,
state=start]
\startinteractionmenu[bottom]
{\interactionbar[alternative=f,width=\makeupwidth,height=2ex]}
\stopinteractionmenu
\starttext
\input knuth
\section{section 1}
\input knuth
\section{section 2}
\input knuth
\section{section 3}
\input knuth
\section{section 4}
\input knuth
\stoptext
it seems that the interactionmenu doesn't have a button for the final page. I'm assuming I did something wrong, but I'm not quite sure what it is.