Hi,
I want to plot a reference line on top of the graph using command tline, but it's just under the graph so that I can't see it.
I found some similar topics that raised by other people, but none of them are using "twoway area" command.

My command as follows:

#delimit;
twoway area aa ab ac ad ae week, graphregion(color(white))
tline(16feb2020,lwidth(thick)) bcolor(ltblue) blcolor(black)
color(blue*.1%50 blue*.3%50 blue*.5%50 blue*.7%50 red*.3%80)
lcolor(black black black black red)
legend(rows(1) size(small))
xtitle("")
ttext(100 16feb2020 "16feb2020", size(8pt) color(red))
saving(trend1,replace)
;

Any tips would be helpful.
Thank you.