Am 06.01.2013 um 15:10 schrieb Sietse Brouwer
but the rightmarginwidth = 3.7569cm, not 0.1cm, I do not know why? what should I do to widen the texwidth?
In which Wolfgang wrote:
The horizontal dimensions are determined by the three values
- backspace (distance from the left/inner margin) - cutspace (distance from the right/outer margin) - width (width of the textblock)
Normally you need only two values because when you set backspace + width the cutspace is > calculated and when you set backspace + cutspace you can write width=middle and the width of the text block will be calculated.
Which is a good explanation, and he explains how vertical dimensions work, too. Allow me to add this e-mail to answer another question you will probably have: "What about the marginwidth, margindistance, edgewidth, and edgedistance? Those are also horizontal values!"
A good question. The answer is that ‘margin’ means two things: 1. the space between the edge of the textblock and the boundary of the paper 2. a typesetting area inside that space, in which marginal material is typeset.
Inside \setuplayout, margin has the second meaning: marginwidth is the width of the margin, and margindistance the distance between the text area and the margin area.
There are also the ‘edges’: these are typesetting areas outside the margin areas. Some uses I can think of: colouring the edge of the page in a guidebook with sections; placing informative marks in general; printing a sort of vertical header/footer; etc.
This is not a bad reference: http://wiki.contextgarden.net/Layout
I wrote a short seven page example where you can see both margins don’t influence the layout because they’re just put on the sides like attachments. \setuppapersize[A4][A3] \setuplayout [location=middle, header=0pt, footer=0pt] \setuppagenumbering[location=] \definefont[BigFont][Mono*none sa 4] \starttext \showframe[page] \centerbox{\BigFont PAGE}\page \setuplayout [backspace=2cm, cutspace=2cm, width=middle, topspace=2cm, bottomspace=2cm, height=middle] \showframe[text] \centerbox{\BigFont TEXTBLOCK}\page \setuplayout [header=2cm, headerdistance=1cm, footer=2cm, footerdistance=1cm] \showframe[header,footer] \centerbox{\BigFont HEADER/FOOTER}\page \setuplayout [leftmargin=2cm, leftmargindistance=1cm] \showframe[leftmargin] \centerbox{\BigFont LEFTMARGIN}\page \setuplayout [leftedge=2cm, leftedgedistance=1cm] \showframe[leftedge] \centerbox{\BigFont LEFTEDGE}\page \setuplayout [rightmargin=2cm, rightmargindistance=1cm] \showframe[rightmargin] \centerbox{\BigFont RIGHTMARGIN}\page \setuplayout [rightedge=2cm, rightedgedistance=1cm] \showframe[rightedge] \centerbox{\BigFont RIGHTEDGE}\page \stoptext Wolfgang