How do you get the buttons within the edge's left and right margins while keeping the button width=\rightedgewidth ?

 

\setuplayout[
 rightmargin=0mm,
 rightedge=15mm]

 

\showframe

 

\def\myButtons{
    \vtop {
  \interactionbuttons[
   width=\rightedgewidth,
   height=20pt]
   [StartMovie]
  \blank
  \interactionbuttons[
   width=\rightedgewidth,
   height=20pt]
   [StartMovie]}}

 

\setupinteraction[state=start]

 

\setuptexttexts[edge]
 [][\myButtons]
  
\starttext
test
\stoptext

 

Best,

Alan