[Jmol-users] lines in frames

[Hens B. <h.b...@cm...>]

A short question, concerning lines and planes in an animation (multiple 
XYZ file).
When I call a script like

frame 1
draw line1 120 (atomno=1) (atomno=2)
draw plane1 200 PERP PLANE $line1

the line is shown in all frames of the animation, while the plane turns 
out to be attached to frame1 only.
Is there a way to confine a line to a particular frame too?
And vice versa, to show the plane in all frames?
(Context: I'd like to show in an animation that eclipsed 
2,3-dichlorobutane has a plane of symmetry, while the most stable all 
trans conformation has an inversion center, visualized by drawing lines 
between related atoms).

Hens