[Therion] FW: Hiding small objects at large scales

[Bruce]

> we should make a dedicated wiki page for scale dependant hiding of
> objects, including a summary of this email thread. What do you think?


Yes, scale dependant sizing and hiding.
To my slight shame I have scattered around the place a few unfinished or
misleading wiki pages that need attention.

When my layouts and metapost have settled down I am open to writing a few
words and posting some examples.

In the meantime some topic ideas...

-Therions built in features 
  -symbol-show, symbol-hide
  -u: v: w:
  -scale dependant font sizes as setup in the initialise metapost definition
  -Base-scale for photo enlargement or for symbol scaling but not both
-Using layouts to manage scale dependant sizing and hiding
-Hiding point text entities
-Hiding line entities (rocks, pitches, labels)
-Hiding area fill entities

Bruce