grid.grob(list.struct, cl = NULL, draw = TRUE)
grid.arrows(x = c(0.25, 0.75), y = 0.5, default.units = "npc", grob = NULL, angle = 30, length = unit(0.25, "inches"), ends = "last", type = "open", name = NULL, gp = gpar(), draw = TRUE, vp = NULL)
arrowsGrob(x = c(0.25, 0.75), y = 0.5, default.units = "npc", grob = NULL, angle = 30, length = unit(0.25, "inches"), ends = "last", type = "open", name = NULL, gp = gpar(), vp = NULL)
grid.convertX(x, unitTo, valueOnly = FALSE)
grid.convertY(x, unitTo, valueOnly = FALSE)
grid.convertWidth(x, unitTo, valueOnly = FALSE)
grid.convertHeight(x, unitTo, valueOnly = FALSE)
grid.convert(x, unitTo, axisFrom = "x", typeFrom = "location", axisTo = axisFrom, typeTo = typeFrom, valueOnly = FALSE)
grid.collection(..., gp=gpar(), draw=TRUE, vp=NULL)
push.viewport(..., recording=TRUE)
pop.viewport(n=1, recording=TRUE)
viewport.transform(vp)
draw.details(x, recording)
convertNative(unit, dimension="x", type="location")