[Therion] How to define steps

[Bill Gee]

A mucdh smaller problem than my last one ... Stark Caverns has several 
places with stairways.  I am using the line type "steps" to draw them 
in.  Three issues:

1) One of the stairways is wider than long, and only three steps.  When 
Therion draws that, it places it sideways.  Is there a way to tell 
Therion how to orient the steps?

Here is the definition from the th2 file:

line steps -close on -attr c 3
   1558.0 -1203.5
   1593.75 -1206.75
   1581.75 -1158.75
   1553.75 -1167.0
   1558.0 -1203.5
endline

This can be seen on the map at

https://campercaver.net/MiscFiles/StarkCavernsNoCenter-1.pdf

Find the Onyx Circle.  There is an arrow calling out a ceiling 
waterfall.  Move west from the arrowhead about 5 scale feet to see this 
set of steps.

There is another stairway very close by which has more steps.  That one 
is oriented correctly.

Related question - Is there a way to indicate which end of the stairway 
is down?

2) I originally defined this stairway using a curved line on one side. 
When Therion compiled the map it gave an error about "illegal steps 
definition".  The only way I found to fix that was to draw it again 
using only straight lines.

I know Therion can have curved lines in a stairway because there are 
some others in this map where I did that.  Is this a case where Therion 
requires straight lines for the top and bottom, but can have curved 
lines for the sides?  If so, then changing the orientation as in problem 
one should fix this.

3) For future versions of Therion - The Therion Book does not have any 
documentation about the "-attr c #" option for the steps line type. 
This needs to be added.  Also a note about curved vs. straight lines, 
and how to change orientation.

Thanks!
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Bill Gee