diff --git a/.config/nvim/after/ftplugin/tex.lua b/.config/nvim/after/ftplugin/tex.lua
index 537d757..c4feb6f 100644
--- a/.config/nvim/after/ftplugin/tex.lua
+++ b/.config/nvim/after/ftplugin/tex.lua
@@ -18,6 +18,18 @@ vim.keymap.set("i", "EE", "É")
 vim.keymap.set("i", "<Space>etc", "\\,etc.")
 vim.keymap.set("i", "<Space>:", "\\,:")
 
+-- pdf viewer
+vim.keymap.set("n", "<leader>zm",
+    ":!$READER main.pdf &<CR><CR>",
+    { desc = "Open $READER on pdf of current file" }
+)
+
+vim.keymap.set("n", "<leader>zz",
+    ":!$READER <C-r>=expand('%:r')<cr>.pdf &<cr><CR>",
+    { desc = "Open $READER on pdf of current file" }
+)
+
+
 -- Snippets
 local ls = require("luasnip")
 
@@ -81,8 +93,10 @@ ls.add_snippets("tex", {
     s("env", {
         t({ "\\begin{" }),
         i(1, "foo"),
-        t({ "}", "\t" }),
+        t({ "}"}),
         i(2),
+        t({ "", "\t" }),
+        i(3),
         t({ "", "\\end{" }),
         f(copy,1),
         t({ "}"}),