diff --git a/docs/concepts/07-editor.md b/docs/concepts/07-editor.md
index de2de3856..9c3a3f214 100644
--- a/docs/concepts/07-editor.md
+++ b/docs/concepts/07-editor.md
@@ -111,7 +111,7 @@ Editor.insertNodes(editor, [element], { at: path })
 Editor.splitNodes(editor, { at: point })
 
 // Add a mark to all the text in a range.
-Editor.addMarks(editor, [mark], { at: range })
+Editor.addMarks(editor, mark, { at: range })
 ```
 
 The editor-specific helpers are the ones you'll use most often when working with Slate editors, so it pays to become very familiar with them.
diff --git a/docs/walkthroughs/04-applying-custom-formatting.md b/docs/walkthroughs/04-applying-custom-formatting.md
index bbc67d6e8..d52065356 100644
--- a/docs/walkthroughs/04-applying-custom-formatting.md
+++ b/docs/walkthroughs/04-applying-custom-formatting.md
@@ -81,7 +81,7 @@ const App = () => {
             // When "B" is pressed, add a bold mark to the text.
             case 'b': {
               event.preventDefault()
-              Editor.addMarks(editor, [{ type: 'bold' }])
+              Editor.addMarks(editor, { type: 'bold' })
               break
             }
           }
@@ -154,7 +154,7 @@ const App = () => {
 
             case 'b': {
               event.preventDefault()
-              Editor.addMarks(editor, [{ type: 'bold' }])
+              Editor.addMarks(editor, { type: 'bold' })
               break
             }
           }
diff --git a/docs/walkthroughs/05-executing-commands.md b/docs/walkthroughs/05-executing-commands.md
index 9236854b8..6d686bdd0 100644
--- a/docs/walkthroughs/05-executing-commands.md
+++ b/docs/walkthroughs/05-executing-commands.md
@@ -55,7 +55,7 @@ const App = () => {
 
             case 'b': {
               event.preventDefault()
-              Editor.addMarks(editor, [{ type: 'bold' }])
+              Editor.addMarks(editor, { type: 'bold' })
               break
             }
           }
diff --git a/packages/slate/src/create-editor.ts b/packages/slate/src/create-editor.ts
index 528d1c47f..7426178b1 100755
--- a/packages/slate/src/create-editor.ts
+++ b/packages/slate/src/create-editor.ts
@@ -89,7 +89,7 @@ export const createEditor = (): Editor => {
       if (Command.isCoreCommand(command)) {
         switch (command.type) {
           case 'add_mark': {
-            Editor.addMarks(editor, [command.mark])
+            Editor.addMarks(editor, command.mark)
             break
           }
 
diff --git a/packages/slate/src/interfaces/editor/transforms/mark.ts b/packages/slate/src/interfaces/editor/transforms/mark.ts
index 88d209afb..a2ad230c1 100644
--- a/packages/slate/src/interfaces/editor/transforms/mark.ts
+++ b/packages/slate/src/interfaces/editor/transforms/mark.ts
@@ -7,7 +7,7 @@ export const MarkTransforms = {
 
   addMarks(
     editor: Editor,
-    marks: Mark[],
+    mark: Mark | Mark[],
     options: {
       at?: Location
       hanging?: boolean
@@ -21,18 +21,19 @@ export const MarkTransforms = {
       }
 
       // De-dupe the marks being added to ensure the set is unique.
+      const marks = Array.isArray(mark) ? mark : [mark]
       const set: Mark[] = []
 
-      for (const mark of marks) {
-        if (!Mark.exists(mark, set)) {
-          set.push(mark)
+      for (const m of marks) {
+        if (!Mark.exists(m, set)) {
+          set.push(m)
         }
       }
 
       for (const [node, path] of Editor.texts(editor, { at })) {
-        for (const mark of set) {
-          if (!Mark.exists(mark, node.marks)) {
-            editor.apply({ type: 'add_mark', path, mark })
+        for (const m of set) {
+          if (!Mark.exists(m, node.marks)) {
+            editor.apply({ type: 'add_mark', path, mark: m })
           }
         }
       }
@@ -41,7 +42,7 @@ export const MarkTransforms = {
 
   removeMarks(
     editor: Editor,
-    marks: Mark[],
+    mark: Mark | Mark[],
     options: {
       at?: Location
       hanging?: boolean
@@ -51,9 +52,10 @@ export const MarkTransforms = {
       const at = splitLocation(editor, options)
 
       if (at) {
-        for (const [mark, i, node, path] of Editor.marks(editor, { at })) {
-          if (Mark.exists(mark, marks)) {
-            editor.apply({ type: 'remove_mark', path, mark })
+        const marks = Array.isArray(mark) ? mark : [mark]
+        for (const [m, i, node, path] of Editor.marks(editor, { at })) {
+          if (Mark.exists(m, marks)) {
+            editor.apply({ type: 'remove_mark', path, mark: m })
           }
         }
       }
@@ -62,7 +64,7 @@ export const MarkTransforms = {
 
   setMarks(
     editor: Editor,
-    marks: Mark[],
+    mark: Mark | Mark[],
     props: Partial<Mark>,
     options: {
       at?: Location
@@ -73,12 +75,13 @@ export const MarkTransforms = {
       const at = splitLocation(editor, options)
 
       if (at) {
-        for (const [mark, i, node, path] of Editor.marks(editor, { at })) {
-          if (Mark.exists(mark, marks)) {
+        const marks = Array.isArray(mark) ? mark : [mark]
+        for (const [m, i, node, path] of Editor.marks(editor, { at })) {
+          if (Mark.exists(m, marks)) {
             const newProps = {}
 
             for (const k in props) {
-              if (props[k] !== mark[k]) {
+              if (props[k] !== m[k]) {
                 newProps[k] = props[k]
               }
             }
@@ -87,7 +90,7 @@ export const MarkTransforms = {
               editor.apply({
                 type: 'set_mark',
                 path,
-                properties: mark,
+                properties: m,
                 newProperties: newProps,
               })
             }
diff --git a/packages/slate/test/transforms/addMarks/path/basic.js b/packages/slate/test/transforms/addMarks/path/basic.js
index 7e22408c9..1149baaf0 100644
--- a/packages/slate/test/transforms/addMarks/path/basic.js
+++ b/packages/slate/test/transforms/addMarks/path/basic.js
@@ -4,7 +4,7 @@ import { Editor } from 'slate'
 import { jsx } from '../../..'
 
 export const run = editor => {
-  Editor.addMarks(editor, [{ key: 'a' }], { at: [0, 0] })
+  Editor.addMarks(editor, { key: 'a' }, { at: [0, 0] })
 }
 
 export const input = (
diff --git a/packages/slate/test/transforms/addMarks/range/basic.js b/packages/slate/test/transforms/addMarks/range/basic.js
index b1174f492..23687eb36 100644
--- a/packages/slate/test/transforms/addMarks/range/basic.js
+++ b/packages/slate/test/transforms/addMarks/range/basic.js
@@ -4,12 +4,16 @@ import { Editor } from 'slate'
 import { jsx } from '../../..'
 
 export const run = editor => {
-  Editor.addMarks(editor, [{ key: 'a' }], {
-    at: {
-      anchor: { path: [0, 0], offset: 1 },
-      focus: { path: [0, 0], offset: 3 },
-    },
-  })
+  Editor.addMarks(
+    editor,
+    { key: 'a' },
+    {
+      at: {
+        anchor: { path: [0, 0], offset: 1 },
+        focus: { path: [0, 0], offset: 3 },
+      },
+    }
+  )
 }
 
 export const input = (
diff --git a/packages/slate/test/transforms/addMarks/selection/block-across-edge-existing.js b/packages/slate/test/transforms/addMarks/selection/block-across-edge-existing.js
index aba28b497..f4c5826c9 100644
--- a/packages/slate/test/transforms/addMarks/selection/block-across-edge-existing.js
+++ b/packages/slate/test/transforms/addMarks/selection/block-across-edge-existing.js
@@ -4,7 +4,7 @@ import { Editor } from 'slate'
 import { jsx } from '../../..'
 
 export const run = editor => {
-  Editor.addMarks(editor, [{ key: 'a' }])
+  Editor.addMarks(editor, { key: 'a' })
 }
 
 export const input = (
diff --git a/packages/slate/test/transforms/addMarks/selection/block-across-existing.js b/packages/slate/test/transforms/addMarks/selection/block-across-existing.js
index 94c29946b..3b08badd1 100644
--- a/packages/slate/test/transforms/addMarks/selection/block-across-existing.js
+++ b/packages/slate/test/transforms/addMarks/selection/block-across-existing.js
@@ -4,7 +4,7 @@ import { Editor } from 'slate'
 import { jsx } from '../../..'
 
 export const run = editor => {
-  Editor.addMarks(editor, [{ key: 'a' }])
+  Editor.addMarks(editor, { key: 'a' })
 }
 
 export const input = (
diff --git a/packages/slate/test/transforms/addMarks/selection/block-across.js b/packages/slate/test/transforms/addMarks/selection/block-across.js
index d228ac72c..b0a3d290c 100644
--- a/packages/slate/test/transforms/addMarks/selection/block-across.js
+++ b/packages/slate/test/transforms/addMarks/selection/block-across.js
@@ -4,7 +4,7 @@ import { Editor } from 'slate'
 import { jsx } from '../../..'
 
 export const run = editor => {
-  Editor.addMarks(editor, [{ key: 'a' }])
+  Editor.addMarks(editor, { key: 'a' })
 }
 
 export const input = (
diff --git a/packages/slate/test/transforms/addMarks/selection/existing.js b/packages/slate/test/transforms/addMarks/selection/existing.js
index bbecfeab6..c68103f68 100644
--- a/packages/slate/test/transforms/addMarks/selection/existing.js
+++ b/packages/slate/test/transforms/addMarks/selection/existing.js
@@ -4,7 +4,7 @@ import { Editor } from 'slate'
 import { jsx } from '../../..'
 
 export const run = editor => {
-  Editor.addMarks(editor, [{ key: 'a' }])
+  Editor.addMarks(editor, { key: 'a' })
 }
 
 export const input = (
diff --git a/packages/slate/test/transforms/addMarks/selection/first-character.js b/packages/slate/test/transforms/addMarks/selection/first-character.js
index febf374e9..2c76fcfaa 100644
--- a/packages/slate/test/transforms/addMarks/selection/first-character.js
+++ b/packages/slate/test/transforms/addMarks/selection/first-character.js
@@ -4,7 +4,7 @@ import { Editor } from 'slate'
 import { jsx } from '../../..'
 
 export const run = editor => {
-  Editor.addMarks(editor, [{ key: 'a' }])
+  Editor.addMarks(editor, { key: 'a' })
 }
 
 export const input = (
diff --git a/packages/slate/test/transforms/addMarks/selection/inline-across.js b/packages/slate/test/transforms/addMarks/selection/inline-across.js
index ed6e5bd65..7ce3a22b5 100644
--- a/packages/slate/test/transforms/addMarks/selection/inline-across.js
+++ b/packages/slate/test/transforms/addMarks/selection/inline-across.js
@@ -4,7 +4,7 @@ import { Editor } from 'slate'
 import { jsx } from '../../..'
 
 export const run = editor => {
-  Editor.addMarks(editor, [{ key: 'a' }])
+  Editor.addMarks(editor, { key: 'a' })
 }
 
 export const input = (
diff --git a/packages/slate/test/transforms/addMarks/selection/last-character.js b/packages/slate/test/transforms/addMarks/selection/last-character.js
index afc9b234e..499273a43 100644
--- a/packages/slate/test/transforms/addMarks/selection/last-character.js
+++ b/packages/slate/test/transforms/addMarks/selection/last-character.js
@@ -4,7 +4,7 @@ import { Editor } from 'slate'
 import { jsx } from '../../..'
 
 export const run = editor => {
-  Editor.addMarks(editor, [{ key: 'a' }])
+  Editor.addMarks(editor, { key: 'a' })
 }
 
 export const input = (
diff --git a/packages/slate/test/transforms/addMarks/selection/middle-character.js b/packages/slate/test/transforms/addMarks/selection/middle-character.js
index a452a3665..e0c1ba2b0 100644
--- a/packages/slate/test/transforms/addMarks/selection/middle-character.js
+++ b/packages/slate/test/transforms/addMarks/selection/middle-character.js
@@ -4,7 +4,7 @@ import { Editor } from 'slate'
 import { jsx } from '../../..'
 
 export const run = editor => {
-  Editor.addMarks(editor, [{ key: 'a' }])
+  Editor.addMarks(editor, { key: 'a' })
 }
 
 export const input = (
diff --git a/packages/slate/test/transforms/addMarks/selection/word.js b/packages/slate/test/transforms/addMarks/selection/word.js
index 23193f4d6..0f3dd87be 100644
--- a/packages/slate/test/transforms/addMarks/selection/word.js
+++ b/packages/slate/test/transforms/addMarks/selection/word.js
@@ -4,7 +4,7 @@ import { Editor } from 'slate'
 import { jsx } from '../../..'
 
 export const run = editor => {
-  Editor.addMarks(editor, [{ key: 'a' }])
+  Editor.addMarks(editor, { key: 'a' })
 }
 
 export const input = (
diff --git a/packages/slate/test/transforms/removeMarks/path/basic.js b/packages/slate/test/transforms/removeMarks/path/basic.js
index 5221cbc61..7fcfc1f0e 100644
--- a/packages/slate/test/transforms/removeMarks/path/basic.js
+++ b/packages/slate/test/transforms/removeMarks/path/basic.js
@@ -4,7 +4,7 @@ import { Editor } from 'slate'
 import { jsx } from '../../..'
 
 export const run = editor => {
-  Editor.removeMarks(editor, [{ key: 'a' }], { at: [0, 0] })
+  Editor.removeMarks(editor, { key: 'a' }, { at: [0, 0] })
 }
 
 export const input = (
diff --git a/packages/slate/test/transforms/removeMarks/range/basic.js b/packages/slate/test/transforms/removeMarks/range/basic.js
index 9696d15e5..1d6d2c81d 100644
--- a/packages/slate/test/transforms/removeMarks/range/basic.js
+++ b/packages/slate/test/transforms/removeMarks/range/basic.js
@@ -4,12 +4,16 @@ import { Editor } from 'slate'
 import { jsx } from '../../..'
 
 export const run = editor => {
-  Editor.removeMarks(editor, [{ key: 'a' }], {
-    at: {
-      anchor: { path: [0, 1], offset: 0 },
-      focus: { path: [0, 1], offset: 2 },
-    },
-  })
+  Editor.removeMarks(
+    editor,
+    { key: 'a' },
+    {
+      at: {
+        anchor: { path: [0, 1], offset: 0 },
+        focus: { path: [0, 1], offset: 2 },
+      },
+    }
+  )
 }
 
 export const input = (
diff --git a/packages/slate/test/transforms/removeMarks/selection/across-blocks.js b/packages/slate/test/transforms/removeMarks/selection/across-blocks.js
index 8c3a8ae63..72ea66699 100644
--- a/packages/slate/test/transforms/removeMarks/selection/across-blocks.js
+++ b/packages/slate/test/transforms/removeMarks/selection/across-blocks.js
@@ -4,7 +4,7 @@ import { Editor } from 'slate'
 import { jsx } from '../../..'
 
 export const run = editor => {
-  Editor.removeMarks(editor, [{ key: 'a' }])
+  Editor.removeMarks(editor, { key: 'a' })
 }
 
 export const input = (
diff --git a/packages/slate/test/transforms/removeMarks/selection/across-inlines.js b/packages/slate/test/transforms/removeMarks/selection/across-inlines.js
index a9b14aca4..887bfa039 100644
--- a/packages/slate/test/transforms/removeMarks/selection/across-inlines.js
+++ b/packages/slate/test/transforms/removeMarks/selection/across-inlines.js
@@ -4,7 +4,7 @@ import { Editor } from 'slate'
 import { jsx } from '../../..'
 
 export const run = editor => {
-  Editor.removeMarks(editor, [{ key: 'a' }])
+  Editor.removeMarks(editor, { key: 'a' })
 }
 
 export const input = (
diff --git a/packages/slate/test/transforms/removeMarks/selection/collapsed-selection.js b/packages/slate/test/transforms/removeMarks/selection/collapsed-selection.js
index 2c020ebfa..e598f0195 100644
--- a/packages/slate/test/transforms/removeMarks/selection/collapsed-selection.js
+++ b/packages/slate/test/transforms/removeMarks/selection/collapsed-selection.js
@@ -4,8 +4,8 @@ import { Editor } from 'slate'
 import { jsx } from '../../..'
 
 export const run = editor => {
-  Editor.addMarks(editor, [{ key: 'a' }])
-  Editor.removeMarks(editor, [{ key: 'a' }])
+  Editor.addMarks(editor, { key: 'a' })
+  Editor.removeMarks(editor, { key: 'a' })
   Editor.insertText(editor, 'a')
 }
 
diff --git a/packages/slate/test/transforms/removeMarks/selection/existing-marks.js b/packages/slate/test/transforms/removeMarks/selection/existing-marks.js
index 900d9562e..712ca820e 100644
--- a/packages/slate/test/transforms/removeMarks/selection/existing-marks.js
+++ b/packages/slate/test/transforms/removeMarks/selection/existing-marks.js
@@ -4,7 +4,7 @@ import { Editor } from 'slate'
 import { jsx } from '../../..'
 
 export const run = editor => {
-  Editor.removeMarks(editor, [{ key: 'a' }])
+  Editor.removeMarks(editor, { key: 'a' })
 }
 
 export const input = (
diff --git a/packages/slate/test/transforms/removeMarks/selection/first-character.js b/packages/slate/test/transforms/removeMarks/selection/first-character.js
index 7ec229087..74c826c2e 100644
--- a/packages/slate/test/transforms/removeMarks/selection/first-character.js
+++ b/packages/slate/test/transforms/removeMarks/selection/first-character.js
@@ -4,7 +4,7 @@ import { Editor } from 'slate'
 import { jsx } from '../../..'
 
 export const run = editor => {
-  Editor.removeMarks(editor, [{ key: 'a' }])
+  Editor.removeMarks(editor, { key: 'a' })
 }
 
 export const input = (
diff --git a/packages/slate/test/transforms/removeMarks/selection/last-character.js b/packages/slate/test/transforms/removeMarks/selection/last-character.js
index 54ab1f98f..548150152 100644
--- a/packages/slate/test/transforms/removeMarks/selection/last-character.js
+++ b/packages/slate/test/transforms/removeMarks/selection/last-character.js
@@ -4,7 +4,7 @@ import { Editor } from 'slate'
 import { jsx } from '../../..'
 
 export const run = editor => {
-  Editor.removeMarks(editor, [{ key: 'a' }])
+  Editor.removeMarks(editor, { key: 'a' })
 }
 
 export const input = (
diff --git a/packages/slate/test/transforms/removeMarks/selection/middle-character.js b/packages/slate/test/transforms/removeMarks/selection/middle-character.js
index d6d213096..f773724e1 100644
--- a/packages/slate/test/transforms/removeMarks/selection/middle-character.js
+++ b/packages/slate/test/transforms/removeMarks/selection/middle-character.js
@@ -4,7 +4,7 @@ import { Editor } from 'slate'
 import { jsx } from '../../..'
 
 export const run = editor => {
-  Editor.removeMarks(editor, [{ key: 'a' }])
+  Editor.removeMarks(editor, { key: 'a' })
 }
 
 export const input = (
diff --git a/packages/slate/test/transforms/removeMarks/selection/part-of-mark-backward.js b/packages/slate/test/transforms/removeMarks/selection/part-of-mark-backward.js
index 2ecbbadf0..9d1e4e161 100644
--- a/packages/slate/test/transforms/removeMarks/selection/part-of-mark-backward.js
+++ b/packages/slate/test/transforms/removeMarks/selection/part-of-mark-backward.js
@@ -4,7 +4,7 @@ import { Editor } from 'slate'
 import { jsx } from '../../..'
 
 export const run = editor => {
-  Editor.removeMarks(editor, [{ key: 'a' }])
+  Editor.removeMarks(editor, { key: 'a' })
 }
 
 export const input = (
diff --git a/packages/slate/test/transforms/removeMarks/selection/part-of-mark.js b/packages/slate/test/transforms/removeMarks/selection/part-of-mark.js
index 02db52f39..c5407d1a8 100644
--- a/packages/slate/test/transforms/removeMarks/selection/part-of-mark.js
+++ b/packages/slate/test/transforms/removeMarks/selection/part-of-mark.js
@@ -4,7 +4,7 @@ import { Editor } from 'slate'
 import { jsx } from '../../..'
 
 export const run = editor => {
-  Editor.removeMarks(editor, [{ key: 'a' }])
+  Editor.removeMarks(editor, { key: 'a' })
 }
 
 export const input = (
diff --git a/packages/slate/test/transforms/removeMarks/selection/whole-word.js b/packages/slate/test/transforms/removeMarks/selection/whole-word.js
index 2bab0a322..9204e60ec 100644
--- a/packages/slate/test/transforms/removeMarks/selection/whole-word.js
+++ b/packages/slate/test/transforms/removeMarks/selection/whole-word.js
@@ -4,7 +4,7 @@ import { Editor } from 'slate'
 import { jsx } from '../../..'
 
 export const run = editor => {
-  Editor.removeMarks(editor, [{ key: 'a' }])
+  Editor.removeMarks(editor, { key: 'a' })
 }
 
 export const input = (
diff --git a/packages/slate/test/transforms/setMarks/path/basic.js b/packages/slate/test/transforms/setMarks/path/basic.js
index 2d9513b50..e02e45fe8 100644
--- a/packages/slate/test/transforms/setMarks/path/basic.js
+++ b/packages/slate/test/transforms/setMarks/path/basic.js
@@ -4,7 +4,7 @@ import { Editor } from 'slate'
 import { jsx } from '../../..'
 
 export const run = editor => {
-  Editor.setMarks(editor, [{ existing: true }], { key: true }, { at: [0, 0] })
+  Editor.setMarks(editor, { existing: true }, { key: true }, { at: [0, 0] })
 }
 
 export const input = (
diff --git a/packages/slate/test/transforms/setMarks/range/basic.js b/packages/slate/test/transforms/setMarks/range/basic.js
index fd292e79e..1fe9c6d77 100644
--- a/packages/slate/test/transforms/setMarks/range/basic.js
+++ b/packages/slate/test/transforms/setMarks/range/basic.js
@@ -6,7 +6,7 @@ import { jsx } from '../../..'
 export const run = editor => {
   Editor.setMarks(
     editor,
-    [{ key: 'a' }],
+    { key: 'a' },
     { thing: true },
     {
       at: {
diff --git a/packages/slate/test/transforms/setMarks/selection/basic.js b/packages/slate/test/transforms/setMarks/selection/basic.js
index fd3d56ffe..60ea89f92 100644
--- a/packages/slate/test/transforms/setMarks/selection/basic.js
+++ b/packages/slate/test/transforms/setMarks/selection/basic.js
@@ -4,7 +4,7 @@ import { Editor } from 'slate'
 import { jsx } from '../../..'
 
 export const run = editor => {
-  Editor.setMarks(editor, [{ key: 'a' }], { thing: true })
+  Editor.setMarks(editor, { key: 'a' }, { thing: true })
 }
 
 export const input = (