You can add this configuration with: "more | envelope | add config for an application".
-- begin Envelope config --

[Netsc4 box]
# 970629
windowtitle=- Netscape Folder
copy={tab}^a^c{tab}
paste=^r{window}^{home}^a^v

[Netsc4 composition]
# 980616
windowtitle=Composition
header1=+{tab}+{tab}{home 3}{tab}{right}{home}+^{end}^c^{home}{tab}{tab}
copy=^a^c^{home}
paste=^a^v^{home}

[Netsc4 message]
# 970629
windowtitle=- Netscape Message
copy=^a^c
paste=^r{window}^a^v^{home}

[netsc4 browsing]
#420498
windowtitle=netscape
copy=^a^c
paste=^{home}^+{end}^v^{home}

-- end Envelope config --