diff --git a/vis/.config/vis/visrc.lua b/vis/.config/vis/visrc.lua
index bd7755c..1fa3b52 100644
--- a/vis/.config/vis/visrc.lua
+++ b/vis/.config/vis/visrc.lua
@@ -189,12 +189,27 @@ local function add_global_mark()
 	end
 end
 
+local lfs = require('lfs')
+local theme_modification = 0
+local last_theme = 'default'
+
 function set_current_theme()
-	local f = io.open(os.getenv('HOME') .. '/.config/xsettingsd/xsettingsd.conf')
+	local path = os.getenv('HOME') .. '/.config/xsettingsd/xsettingsd.conf'
+	local m = lfs.attributes(path, 'modification')
+	if m == theme_modification then
+		return
+	end
+	theme_modification = m
+	local f = io.open(path)
 	if f then
 		local s = f:read('*all')
 		f:close()
-		if s:match('light') then
+		local theme = s:match('light') and 'light' or 'dark'
+		if theme == last_theme then
+			return
+		end
+		last_theme = theme
+		if theme == 'light' then
 			vis:command('set theme lupan-light')
 		else
 			vis:command('set theme lupan-dark')
@@ -349,7 +364,11 @@ vis.events.subscribe(vis.events.INIT, function()
 	vis:map(vis.modes.NORMAL, ' tl', function()
 		vis:command('set theme lupan-light')
 	end, 'change to light theme')
-	vis:map(vis.modes.NORMAL, ' tt', set_current_theme)
+
+	vis:map(vis.modes.NORMAL, '<C-l>', function()
+		vis:feedkeys('<vis-selections-remove-column-except>')
+		set_current_theme()
+	end, 'Remove all but the count selection column and update theme if needed')
 
 	set_current_theme()
 end)