diff --git a/autoload/noteworthy.vim b/autoload/noteworthy.vim
index e03a88e..73d8a02 100644
--- a/autoload/noteworthy.vim
+++ b/autoload/noteworthy.vim
@@ -1,29 +1,29 @@
 ""
 " Open/create a note.
-function! noteworthy#Note(range, line1, line2, file) abort
-  call s:File('edit', a:file, a:range, a:line1, a:line2)
+function! noteworthy#Note(range, line1, line2, ...) abort
+  call s:File('edit', a:range, a:line1, a:line2, a:000)
 endfunction
 
 ""
 " Open/create a note in a new tab.
-function! noteworthy#Tnote(range, line1, line2, file) abort
-  call s:File('tabedit', a:file, a:range, a:line1, a:line2)
+function! noteworthy#Tnote(range, line1, line2, ...) abort
+  call s:File('tabedit', a:range, a:line1, a:line2, a:000)
 endfunction
 
 ""
 " Open/create a note in a new split.
-function! noteworthy#Snote(range, line1, line2, file) abort
+function! noteworthy#Snote(range, line1, line2, ...) abort
   call s:File(get(
         \   g:, 'noteworthy_split_size', ''
-        \ ) . 'split', a:file, a:range, a:line1, a:line2)
+        \ ) . 'split', a:range, a:line1, a:line2, a:000)
 endfunction
 
 ""
 " Open/create a note in a new vertical split.
-function! noteworthy#Vnote(range, line1, line2, file) abort
+function! noteworthy#Vnote(range, line1, line2, ...) abort
   call s:File(get(
         \   g:, 'noteworthy_vsplit_size', ''
-        \ ) . 'vsplit', a:file, a:range, a:line1, a:line2)
+        \ ) . 'vsplit', a:range, a:line1, a:line2, a:000)
 endfunction
 
 ""
@@ -205,11 +205,18 @@ endfunction
 
 ""
 " Create or open a note in the current library.
-function! s:File(command, file, range, line1, line2) abort
+function! s:File(command, range, line1, line2, file) abort
   let l:delim = s:GetNoteDelimiter()
   let l:fext = s:GetNoteFileExt()
-  let l:file = s:GetFileName(a:file, l:delim, 1)
-  let l:basedir = fnamemodify(l:file, ':h')
+  if empty(a:file)
+    let l:file = '__Scratch_Note__.' . l:fext
+    let l:type = 'scratch'
+  else
+    let l:file = s:GetFileName(a:file[0], l:delim, 1)
+    let l:basedir = fnamemodify(l:file, ':h')
+    if !isdirectory(l:basedir) | call mkdir(l:basedir, 'p') | endif
+    let l:type = 'note'
+  endif
   if a:range
     let l:lines = getline(a:line1, a:line2)
     let l:indent_level = s:GetIndentLevel(l:lines)
@@ -218,10 +225,18 @@ function! s:File(command, file, range, line1, line2) abort
       let l:lines = ['```' . &ft] + map(l:lines, l:callback) + ['```']
     endif
   endif
-  if !isdirectory(l:basedir) | call mkdir(l:basedir, 'p') | endif
-  execute a:command l:file
-  if get(g:, 'noteworthy_use_header', 1) && getfsize(l:file) <= 0
-    let l:title = substitute(fnamemodify(l:file, ':t:r'), l:delim, ' ', 'g')
+  let l:buf_nr = bufnr(l:file)
+  if l:buf_nr == -1
+    execute a:command l:file
+    if l:type ==# 'scratch' | call s:SetScratchOptions() | endif
+  else
+    let l:win_nr = bufwinnr(l:buf_nr)
+    if l:win_nr != -1
+      if winnr() != l:win_nr | execute l:win_nr . 'wincmd w' | endif
+    endif
+  endif
+  if get(g:, 'noteworthy_use_header', 1) && getfsize(l:file) <= 0 && empty(getline(1))
+    let l:title = trim(substitute(fnamemodify(l:file, ':t:r'), l:delim, ' ', 'g'))
     call append(0, s:GetFormattedTitle(l:title))
   endif
   if exists('l:lines')
@@ -280,7 +295,7 @@ function! s:DynamicLibraryName() abort
 endfunction
 
 function! s:CacheLibrary(library) abort
-  let l:file =  s:GetCacheFile()
+  let l:file = s:GetCacheFile()
   let l:dir = fnamemodify(l:file, ':h')
   if !isdirectory(l:dir) | call mkdir(l:dir, 'p') | endif
   let l:text = [a:library]
@@ -301,3 +316,13 @@ function! s:GetIndentLevel(lines) abort
   endfor
   return min(l:indent_levels)
 endfunction
+
+function! s:SetScratchOptions() abort
+  setlocal bufhidden=hide
+  setlocal buftype=nofile
+  setlocal foldcolumn=0
+  setlocal nobuflisted
+  setlocal nofoldenable
+  setlocal nonumber
+  setlocal noswapfile
+endfunction
diff --git a/doc/noteworthy.txt b/doc/noteworthy.txt
index da1b279..35bf43c 100644
--- a/doc/noteworthy.txt
+++ b/doc/noteworthy.txt
@@ -233,29 +233,28 @@ Change where cache files are kept.
 COMMANDS                                                   *noteworthy-commands*
 
                                                                   *Note* *:Note*
-:[{range}]Note {topic} [{, ...}]
-                            Create new {topic} markdown file in the
+:[{range}]Note [{topic}]    Create new {topic} markdown file in the
                             |b:noteworthy_current_library|, or open it if it
                             already exists. The file extension can be omitted.
                             Can be multiple words separated by spaces, which
                             will be replaced by underscores in the file name.
-                            If [{range}] is provided (works with visual
-                            selection), the lines of the current file will be
-                            appended to the note. By default, the copied text
-                            will be wrapped in a markdown code block. To
-                            disable this, see |g:noteworthy_use_code_block|.
+                            If {topic} is not provided, a scratch buffer will
+                            be created, which can't be saved, and will be
+                            deleted once the window is closed. If {range} is
+                            provided (works with visual selection), the lines
+                            of the current file will be appended to the note.
+                            By default, the copied text will be wrapped in a
+                            markdown code block. To disable this, see
+                            |g:noteworthy_use_code_block|.
 
                                                                 *Snote* *:Snote*
-:[{range}]Snote {topic} [{, ...}]
-                            Same as |:Note|, but opens in a split.
+:[{range}]Snote [{topic}]   Same as |:Note|, but opens in a split.
 
                                                                 *Vnote* *:Vnote*
-:[{range}]Vnote {topic} [{, ...}]
-                            Same as |:Note|, but opens in a vertical split.
+:[{range}]Vnote [{topic}]   Same as |:Note|, but opens in a vertical split.
 
                                                                 *Tnote* *:Tnote*
-:[{range}]Tnote {topic} [{, ...}]
-                            Same as |:Note|, but opens in new tab.
+:[{range}]Tnote [{topic}]   Same as |:Note|, but opens in new tab.
 
 
                                                       *NoteSearch* *:NoteSearch*
diff --git a/plugin/noteworthy.vim b/plugin/noteworthy.vim
index 620acc1..74f7072 100644
--- a/plugin/noteworthy.vim
+++ b/plugin/noteworthy.vim
@@ -5,16 +5,16 @@ let g:loaded_noteworthy = 1
 
 call noteworthy#Init()
 
-command! -range=0 -nargs=1 -complete=custom,noteworthy#Completion Note
+command! -range=0 -nargs=? -complete=custom,noteworthy#Completion Note
       \ call noteworthy#Note(<range>, <line1>, <line2>, <f-args>)
 
-command! -range=0 -nargs=1 -complete=custom,noteworthy#Completion Vnote
+command! -range=0 -nargs=? -complete=custom,noteworthy#Completion Vnote
       \ call noteworthy#Vnote(<range>, <line1>, <line2>, <f-args>)
 
-command! -range=0 -nargs=1 -complete=custom,noteworthy#Completion Snote
+command! -range=0 -nargs=? -complete=custom,noteworthy#Completion Snote
       \ call noteworthy#Snote(<range>, <line1>, <line2>, <f-args>)
 
-command! -range=0 -nargs=1 -complete=custom,noteworthy#Completion Tnote
+command! -range=0 -nargs=? -complete=custom,noteworthy#Completion Tnote
       \ call noteworthy#Tnote(<range>, <line1>, <line2>, <f-args>)
 
 command! -bang -nargs=? -complete=custom,noteworthy#LibraryCompletion NoteLibrary