Hello, there! I am the original author of the typography extensions in Inkscape. Those were implemented roughly 4 years ago and used to work well. I tried using them again today and noticed that the positioning of the guidelines is wrong in the current development version of Inkscape. The specific one I'm talking about is: share/extensions/setup_typography_canvas.py Looking at git blame (I am using git bzr) I have seen that tavmjong did modify the code some months ago (actually in October 2014) adding a declaration of document units being in pixels. =================== commit 4c2c309889e6c7ad12ddd2479294ccc6f3564953 Author: tavmjong-free <tavmjong@...8...> Date: Thu Oct 9 11:25:39 2014 +0200 Add proper 'viewBox', set 'inkscape:document-units', set maximum em-size to 2048 as is typical in TrueType. =================== What I observe on the current misbehaviour is that the positioning of the guidelines is being done as if the units were given in millimeters... I'm not sure whose fault is this: If it is the parsing of the sp-guide parameters that ignore units, or if it is my extension that should explicitely append "px" to the values instead of simply passing plain unit-less numbers. Anyway... It's been a long time I've written this code and perhaps someone here who's been more active these years in the project may have a quick answer to my issue. Otherwise, I'll be investigating it further in order to get it fixed, anyway. happy hacking, Felipe Sanches (a.k.a. "Juca")