diff --git a/home/nvim/files/lua/teaching.lua b/home/nvim/files/lua/teaching.lua
index ff558c3..fcb3406 100644
--- a/home/nvim/files/lua/teaching.lua
+++ b/home/nvim/files/lua/teaching.lua
@@ -34,8 +34,7 @@ local function should_load(path)
 end
 
 function teaching.load()
-    require("trouble").open("diagnostics")
-    require("nvim-tree").open()
+    vim.cmd("NvimTreeFindFileToggle")
     local scan = require("plenary.scandir").scan_dir('.')
     local cwd = vim.fn.getcwd()
     for _, v in ipairs(scan) do
@@ -48,6 +47,7 @@ function teaching.load()
         end
     end
     vim.api.nvim_set_current_dir(cwd)
+    require("trouble").open("diagnostics")
 end
 
 vim.api.nvim_create_user_command("AP", teaching.load, {})
diff --git a/home/utils/desktop.nix b/home/utils/desktop.nix
index 0b9a2c5..e12cd81 100644
--- a/home/utils/desktop.nix
+++ b/home/utils/desktop.nix
@@ -70,6 +70,7 @@
     };
     associations.added = {
         "x-scheme-handler/tg" = "org.telegram.desktop.desktop";
+         "image/jpeg" = "org.gnome.Loupe.desktop";
     };
   };
 }