Hi, I am experimenting the new LuaMetaTeX features introduced recently, but I can't get the built-in features together. To explain the problem I encounter, I want to draw the graph of a function on a grid in which the x-axis and the y-axis are alos drawn. Now lmtx has the « instances » (if I am not wrong…) named lmt_axis, lmt_grid and lmt_function which separately work fine, but I dont see how to use them simultaneously by keeping the correct scaling. In the minimal example below, copied from luametafun.pdf, the graph of the function $f(x) := (x - 1)^2$ should be drawn by showing its minimum at $x = 1$, and its value at $x = 0$ should be equal to 1. However the graph on the grid does not show this. Moreover the axes do not match the grid. This means that I have not understood how to give the same units and scales in the three instances lmt_axis, lmt_grid and lmt_function. Thanks for any help: Otared K. PS: here is a minimal example % begin grid-axis-function.tex \starttext \startplacefigure \startMPcode{doublefun} draw lmt_grid [ nx = 10, ny = 10, dx = 1, dy = 1 ] xsized 5cm withpen pencircle scaled .1pt withcolor "darkblue" ; draw lmt_axis [ nx = 10, ny = 10, dx = 1, dy = 1, ] xsized 5cm withpen pencircle scaled .5pt withcolor "darkred" ; draw lmt_function [ xmin = 0, xmax = 2, xstep = .05, ymin = 0, ymax = 1.5, code = "(x - 1)*(x - 1)", ] xsized 5cm withpen pencircle scaled .75pt ; \stopMPcode \stopplacefigure \stoptext % end grid-axis-function.tex