diff --git a/autoload/quickui/utils.vim b/autoload/quickui/utils.vim
index 7486583..b63ad98 100644
--- a/autoload/quickui/utils.vim
+++ b/autoload/quickui/utils.vim
@@ -434,6 +434,18 @@ function! quickui#utils#get_cursor(winid)
 endfunc
 
 
+"----------------------------------------------------------------------
+" first line to show in window.
+"----------------------------------------------------------------------
+function! quickui#utils#set_firstline(winid, line)
+	if g:quickui#core#has_nvim == 0
+		call popup_setoptions(a:winid, {'firstline': a:line})
+	else
+		call nvim_win_set_cursor(a:winid, [a:line, 0])
+	endif
+endfunc
+
+
 "----------------------------------------------------------------------
 " get topline in current window
 "----------------------------------------------------------------------