[Therion] cross-section drawing

[Stacho Mudrak]

Quoting Wookey <wookey at aleph1.co.uk>:
> alongside the cave, and their natural scale is 'the same as the plan'.
> It would be nice if there was some way to specify the scale as 'like
> scrap foo'.

By default, when you insert scrap, the scale is set up to scale of  
last scrap edited. So theoretically, you need to set scale once and  
then just insert new scraps.

I need to have a look, what can I do about -scale-like option.

> The biggest problem is finding the corner-markers.

100% agree. Shame on me :(

I see following improvements easy to code:
1. Adding a thick red arrow joining scale markers.
2. Adding a button that will put scale markers + arrow into center of  
current screen.
Would it help you? Do you see other solutions?

S.