Thanks Bill,
I KNEW it had to be in there somewhere - you sure don't miss much in
the way of features to add.
Joe

--- In guide-user@yahoogroups.com, Bill J Gray <pluto@p...> wrote:
> Hi Joe,
>
> For that, you should right-click on the grid, then on the
Display button
> in the resulting dialog. (Or on the menu entry Display... Ticks,
Grids, Etc.,
> then on the 'grids' check-box; it'll get you to the same place.)
>
> You'll see that you can select an epoch for the grids (or for
each of the
> other measurement markings). Select 'D', and you'll get grids in
the epoch
> of date.
>
> In theory, this provides the useful ability to set up grids in
one epoch
> and other markings, such as ticks, in a different epoch. This
really _is_
> useful in the world of terrestrial mapping, where one often sees
maps made
> with a grid in one geodetic datum and ticks superimposed in a
different datum,
> whilst getting coordinates read out in some other datum. In
reality, I'm
> beginning to think it sows more confusion than light; I may switch
to a
> single epoch for cursor readout and for measurement markings.
>
> -- Bill