Vertical Spacing less than @sp 1

[Christopher Dimech]

Is it possible to introduce a spacing between two lines of text
to be less than '@sp 1' or '@*', perhaps by half.

When I am writing a list or enumeration using @* look
as too much of a vertical space.

@enumerate
---@item
-----Line Text 1
-----@item
-----Line Text 2 @sp 0.5
---@item
-----Line Text 3
@end enumerate