Vertical position of whole-measure rest

[Frank Steinmetzger]

Hello again

this time it is really a problem and not a fault of my own. :-)

Namely: there is a small part with two voices, in which I need to move the 
whole-measure rest in the lower voice down a bit (see screenie).

I found http://lsr.dsi.unimi.it/LSR/Item?id=159 which explains \rest, i.e.
a4.\rest. However, that gives me a normal r4., whereas I need an R4..

How can I achieve that? Thanks.
-- 
Gruß | Greetings | Qapla'
Contrariwise, if it was so, it might be; and if it were so, it would be;
but as it isn’t, it ain’t.

rest.png
Description: PNG image