diff --git a/lua/lsp.lua b/lua/lsp.lua
index 5b6fdef..a624750 100644
--- a/lua/lsp.lua
+++ b/lua/lsp.lua
@@ -35,6 +35,10 @@ vim.api.nvim_create_autocmd("LspAttach", {
     nmap('gI', require('telescope.builtin').lsp_implementations, '[G]oto [I]mplementation')
     nmap('<leader>D', require('telescope.builtin').lsp_type_definitions, 'Type [D]efinition')
     nmap('<leader>ds', require('telescope.builtin').lsp_document_symbols, '[D]ocument [S]ymbols')
+    nmap('<leader>dd', function()
+      local new_config = not vim.diagnostic.config().virtual_lines
+      vim.diagnostic.config({ virtual_lines = new_config })
+    end, '[D]iagnostic toggle virtual lines')
     nmap('<leader>ws', require('telescope.builtin').lsp_dynamic_workspace_symbols, '[W]orkspace [S]ymbols')
 
     -- See `:help K` for why this keymap
@@ -60,7 +64,7 @@ vim.api.nvim_create_autocmd("LspAttach", {
 require('which-key').add {
   -- { "<leader>c",  group = "[C]ode" },
   -- { "<leader>c_", hidden = true },
-  { "<leader>d",  group = "[D]ocument" },
+  { "<leader>d",  group = "[D]ocument / [D]iagnostic" },
   { "<leader>d_", hidden = true },
   { "<leader>g",  group = "[G]it" },
   { "<leader>g_", hidden = true },