\setupcolumns

Syntax

\setupcolumns[...,...=...,...]
n	number
ntop	number
rule	on off
height	dimension
tolerance	verystrict strict tolerant verytolerant stretch
distance	dimension
balance	yes no
align	yes no text
blank	fixed halfline line flexible big medium small
option	background
direction	left right
[...,...=...,...]	see \setupframed

Consider using paragraphs (\defineparagraphs or column sets (\startcolumnset instead of ‘simple’ columns.

n	Number of columns. Default is n=2.
rule	Draw a line between the columns. Default is off.
tolerance	Affects spacing. Narrow columns should be set tolerant, verytolerant or stretch
distance	Size of the gap between the columns.
balance	Should the columns be balanced, i.e. should they get the same number of lines?
align	Left, right (raggedleft, raggedright).
blank	Amount of whitespace between paragraphs set in columns. Also accepts a dimension as an argument. Column equivalent of `\setupwhitespace`.
option	With option=background you can use everything that \setupframed offers.
direction	Default is right, i.e. the first column is on the left; 'left' means the first column is the rightmost.
height	height is unclear to me.
ntop	ntop has to do with balancing, but I can't make sense of it. See page-mult.tex / minbalancetoplines.

All issues with:

/tr>