Nick

Hi Vince, The description of the arcto in the documentation says: Draws a line from the current point to (x1,y1) then to (x2,y2) but fits an arc of radius rad joining the two vectors instead of a vertex at the point (x1,y1). Based on this, I would expect it to first draw a line to x1,y1 and then an arc of circular (not elliptical) radius rad to x2,y2. There is also an accompanying figure on page 9 of the gle-manual.pdf document. That figure clearly shows a bold line first being drawn to the specified...

Hi Vince, I'm running Version: 4.2.5 Build date: Aug 17 2015 22:09:00 on Windows 10 Pro (v1903, build 18362.720). Here is some demo code: size 10 10 amove 1.5 .5 rline 1 0 set lwidth .1 arcto 2 0 -1 1 .5 set lwidth 0 rline -1 1 amove 6 .5 rline 1 0 set lwidth .1 arcto 2 0 -1 1 2 set lwidth 0 rline -1 1 amove 1.5 6 rline 1 0 set lwidth .1 arcto 2 0 -1 1 10 set lwidth 0 rline -1 1 amove 6 6 rline 1 0 set lwidth .1 arcto 2 0 -1 1 0.01 set lwidth 0 rline -1 1 I am just copying and slightly modifying...

arcto primitive behvior not as described in manual