Hi Bill I think that merging what you have with an interim defaultscale:=0.6; variable as demonstrated by Thomas Holder here https://therion.speleo.sk/wiki/metapost#special_symbol_examples will do the trick. You probably want to keep the sc in def p_u_electriclight (expr pos,theta,sc,al), and multiply it by defaultscale before calling T:=identity... Probably some trial and error involved. Bruce -----Original Message----- From: Therion <therion-bounces@speleo.sk> On Behalf Of Bill Gee Sent: Monday, 13 May 2019 06:14 To: Therion Mail List <therion@speleo.sk> Subject: [Therion] Setting scale on custom symbol Hello everyone - I have defined a custom symbol for electric light fixtures. The MetaPost code is below. Now that I have used it, I find that it draws the symbol too large. I tried using "-scale small" and "-scale tiny", and that helps. Rather than go through and add that to every point, I would like to change the MetaPost so it draws the symbol a bit smaller. And I am lazy! I could replot all the points for each of the lines. It seems to me there should be a simpler way. I tried messing with the U:= parameters, but they seem to make no difference whatever. Is there a way I can declare a multiplier in the MetaPost code? Perhaps declaring u = 0.6u? Thanks! -- Bill Gee # This code defines an artificial electric light. Used in tourist sections of a cave. def p_u_electriclight (expr pos,theta,sc,al) = U:=(0.3u, 0.3u); T:=identity aligned al rotated theta scaled sc shifted pos; pickup PenC; thdraw fullcircle scaled 0.5u shifted (0.0u, 0.7u); thdraw (-0.5u, -0.6u) -- (-0.5u, 0.0u); thdraw (-0.5u, 0.0u) .. (-0.35u, 0.55u) .. (0.0u, 0.7u); thdraw (0.0u, 0.7u) .. (0.35u, 0.55u) .. (0.5u, 0.0u); thdraw (0.5u,0.0u) -- (0.5u, -0.6u); thdraw (-0.7u, -0.6u) -- (0.7u, -0.6u); enddef; _______________________________________________ Therion mailing list Therion@speleo.sk https://mailman.speleo.sk/listinfo/therion