changing size of axis numbers & add axis break

Hi,

I have my code which makes my graph but I want to increase the SIZE OF THE AXIS NUMBERS and and add a AXIS BREAK to the graph

sweden %>%
group_by(zone, bartsia) %>%
summarise(
mean = mean(diversity.index),
se = (sd(diversity.index))/sqrt(n())
) %>%
ungroup() %>%
ggplot(aes(x = bartsia, y = mean, ymax = mean + se, ymin = mean - se)) +
geom_point()+ geom_errorbar() + facet_wrap(~zone) +labs(y="Diversity Index", x="Bartsia") + theme(
# Remove panel border
panel.border = element_blank(),
# Remove panel grid lines
panel.grid.major = element_blank(),
panel.grid.minor = element_blank(),
# Remove panel background
panel.background = element_blank(),
# Add axis line
axis.line = element_line(colour = "grey")
)

Any help would be greatly appreciated

thanks

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