I don't seem to be able to reset the alts in DM via Apply to All once I've used an overlay. This is what I did.
new map : blank/inflate
defaults
DM view
DM brush
defaults
Alt =4000
Spec Type = File overlay
Parameter = 1
draw with pencil
operations>heightfield>generate map
view> show DM
DM Brush: set all pixels to 0 alt.
alt =0
apply to all
The pixel colours are reset but it's leaving the overlay text in place ("Fo 1") even though you've you set all of the DM pixels to 0 alt.
If you then generate a heightfield map the overlay is still there so it's not just cosmetic. However if you generate a map preview, the changes to 0 alt have been made.
I can't work out what's going on with the Hello World overlay- it's the same as Mt St Helens except that in generate map it removes the mountain but not the 'Hello World'.
monks