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Running Metafont interactively

TeX - LaTeX Asked on August 25, 2021

I tried the first experiment in chapter 5 in the Metafontbook: ran mf, typed
relax and drawdot (35,70); showit;. This opened a window entitled
Metafont, but containing nothing. What’s missing? Using TeXlive 2020 on Linux.

PS. After adding drawdot (65,70); showit; I see both dots.

PS II. Which have now disappeared, after I changed window-manager workspace and back.

PS III. Typing showit; before the first drawdot opens a window and allows the first dot to be seen, but after having switched workspaces and back, I haven’t found any way of bringing the picture back, short of drawing something more and showing it.

One Answer

Until this is fixed (in X?), do the following.

Before drawing anything, type openit; to open a window. If you have left the workspace and come back, type openit; showit; to redraw the current picture. (Gleaned from the METAFONTbook p. 192.)

Answered by Toothrot on August 25, 2021

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