How to add header for "% Weights" column to the left of "Correlation [95% CI]"

General
1

Context: I am trying to add a header on my forest plot for "% Weights" column to the left of "Correlation ]95% CI]": Forest Plots (Default Method) — forest.default • metafor

forest(
    res_tnfa,
    showweights=TRUE,
    annotate=TRUE,
    xlim=c(-1.6,1.6),
    atransf=transf.ztor,
    at=transf.rtoz(c(-.6,-.4,-.2,0,.2,.4,.6)),
    digits=c(2,1),
    cex=0.9,
    header="Authors. (Year)",
    xlab="Correlation coefficient",
    slab=paste(tnfa$author, tnfa$year, sep=" "
))

Problem: When I try to do it using the header argument in the forest function, it yields this result.

forest(
    res_tnfa,
    showweights=TRUE,
    annotate=TRUE,
    xlim=c(-1.6,1.6),
    atransf=transf.ztor,
    at=transf.rtoz(c(-.6,-.4,-.2,0,.2,.4,.6)),
    digits=c(2,1),
    cex=0.9,
    header=c("Authors. (Year)", "% Weights", "Correlation [95% CI]"),
    xlab="Correlation coefficient",
    slab=paste(tnfa$author, tnfa$year, sep=" "
))

error

A bonus thing I am trying to add is a confidence interval to the summary effect size (to the right of RE Model) if anyone knows how to do this!

2

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