Align left in the caption

[jcocao]

Hi,

i want to align to the left side my tables and figures captions but it's seems that the officer forces the center align.

Below you can see the yaml,

title: "Untitled"
output:
officedown::rdocx_document:
tables:
caption:
pre: 'Table'
sep: ':'
date: "2023-12-04"

the setup,

library(flextable)
   library(officedown)
#> Warning: package 'officedown' was built under R version 4.3.2
   library(officer)
#> Warning: package 'officer' was built under R version 4.3.2
   my_theme <- function(x, ...) {
       x <- colformat_double(x, big.mark = ".", decimal.mark = ",")
       x <- set_table_properties(x, layout = "fixed")
       x <- border_remove(x)
       x <- color(x, color = "white", part = "header")
       std_border <- fp_border(width = 1, color = "#B0C4DE")
       big_border = fp_border(color="#284379", width = 2)
       #  x <- border_outer(x, part="all", border = std_border )
       x <- border_inner_h(x, border = std_border, part="all")
       #  x <- border_inner_v(x, border = std_border, part="all")
       x <- hline_bottom(x, border = big_border, part = "body")
       x <- bold(x, part = "header")
   }
   knitr::opts_chunk$set(echo = FALSE)
   set_flextable_defaults(big.mark = ".", 
                          font.size = 10, font.family = "Roboto", theme_fun = my_theme,
                          padding.bottom = 2, 
                          padding.top = 2,
                          padding.left = 3,
                          padding.right = 3,
                          background.color = "white",
                          decimal.mark = ",",
                          digits = 1,
                          na_str = "-")

^{Created on 2023-12-04 with reprex v2.0.2}

and a example of a table

flextable(iris[1:10,1:3]) %>%
    set_header_labels( Sepal.Length = "Length of sepal", 
                       Sepal.Width = "Width of sepal", 
                       Petal.Length = "Length of petal") %>% 
    add_footer_lines( "The footer: one foot to rule them alll") %>% 
    bg(bg = "#284379", part = "header") %>% 
    bg(bg = "#F3FAFC", part = "body") %>% 
    color(part = "footer", color = "#151515") %>% 
    align( align = "right", j = 2, part = "all") %>% 
    align( align = "right", j = 3, part = "all") %>% 
    italic( j = 3) %>% 
    bold( i = 1) %>% 
    width( j = 1, width = 4.1) %>% 
    width( j = 2, width = 1.3) %>% 
    width( j = 3, width = 0.8)

^{Created on 2023-12-04 with reprex v2.0.2}

and next the chunk paramenters.

{r egrxcur, tab.cap="Title 2023", tab.id = "egrxcur", tab.cap.style = "heading 4"}

And the output as follow.

I changed the tab.cap.style for others styles, Normal and heading 1, 2, 3 ... and still the caption stay in the center. It is possible to change? I'm doing something wrong?

Thank you in advance.