diff --git a/nw/config.py b/nw/config.py
index 5735e772..281fe863 100644
--- a/nw/config.py
+++ b/nw/config.py
@@ -323,6 +323,9 @@ class Config:
         self.showLineEndings = self._parseLine(
             cnfParse, cnfSec, "showlineendings", self.CNF_BOOL, self.showLineEndings
         )
+        self.bigDocLimit = self._parseLine(
+            cnfParse, cnfSec, "bigdoclimit", self.CNF_INT, self.bigDocLimit
+        )
 
         ## Backup
         cnfSec = "Backup"
@@ -413,6 +416,7 @@ class Config:
         cnfParse.set(cnfSec,"spellcheck",      str(self.spellLanguage))
         cnfParse.set(cnfSec,"showtabsnspaces", str(self.showTabsNSpaces))
         cnfParse.set(cnfSec,"showlineendings", str(self.showLineEndings))
+        cnfParse.set(cnfSec,"bigdoclimit",     str(self.bigDocLimit))
 
         ## Backup
         cnfSec = "Backup"
diff --git a/nw/gui/dialogs/configeditor.py b/nw/gui/dialogs/configeditor.py
index 89bf6992..1932e341 100644
--- a/nw/gui/dialogs/configeditor.py
+++ b/nw/gui/dialogs/configeditor.py
@@ -173,11 +173,24 @@ class GuiConfigEditGeneral(QWidget):
             self.spellToolList.setCurrentIndex(toolIdx)
         self._doUpdateSpellTool(0)
 
-        self.spellLangForm.addWidget(QLabel("Provider"), 0, 0)
-        self.spellLangForm.addWidget(self.spellToolList, 0, 1)
-        self.spellLangForm.addWidget(QLabel("Language"), 1, 0)
-        self.spellLangForm.addWidget(self.spellLangList, 1, 1)
-        self.spellLangForm.setColumnStretch(2, 1)
+        self.spellBigDoc = QSpinBox(self)
+        self.spellBigDoc.setMinimum(10)
+        self.spellBigDoc.setMaximum(10000)
+        self.spellBigDoc.setSingleStep(10)
+        self.spellBigDoc.setToolTip((
+            "Disable spell checking when loading large documents. "
+            "Spell checking will only run on paragraphs you edit."
+        ))
+        self.spellBigDoc.setValue(self.mainConf.bigDocLimit)
+
+        self.spellLangForm.addWidget(QLabel("Provider"),   0, 0)
+        self.spellLangForm.addWidget(self.spellToolList,   0, 1, 1, 3)
+        self.spellLangForm.addWidget(QLabel("Language"),   1, 0)
+        self.spellLangForm.addWidget(self.spellLangList,   1, 1, 1, 3)
+        self.spellLangForm.addWidget(QLabel("Size limit"), 2, 0)
+        self.spellLangForm.addWidget(self.spellBigDoc,     2, 1)
+        self.spellLangForm.addWidget(QLabel("kb"),         2, 2)
+        self.spellLangForm.setColumnStretch(4, 1)
 
         # AutoSave
         self.autoSave     = QGroupBox("Automatic Save", self)
@@ -540,6 +553,7 @@ class GuiConfigEditEditor(QWidget):
         self.outerBox.addWidget(self.quoteStyle,  2, 1, 2, 1)
         self.outerBox.addWidget(self.showGuides,  4, 1)
         self.outerBox.setColumnStretch(2, 1)
+        self.outerBox.setRowStretch(5, 1)
         self.setLayout(self.outerBox)
 
         return