diff --git a/client/package-lock.json b/client/package-lock.json
index 7d63a89..b8c35fe 100644
--- a/client/package-lock.json
+++ b/client/package-lock.json
@@ -2066,6 +2066,11 @@
         }
       }
     },
+    "@types/uuid": {
+      "version": "8.3.0",
+      "resolved": "https://registry.npmjs.org/@types/uuid/-/uuid-8.3.0.tgz",
+      "integrity": "sha512-eQ9qFW/fhfGJF8WKHGEHZEyVWfZxrT+6CLIJGBcZPfxUh/+BnEj+UCGYMlr9qZuX/2AltsvwrGqp0LhEW8D0zQ=="
+    },
     "@types/yargs": {
       "version": "13.0.10",
       "resolved": "https://registry.npmjs.org/@types/yargs/-/yargs-13.0.10.tgz",
diff --git a/client/package.json b/client/package.json
index 03718a5..1fb3ac0 100644
--- a/client/package.json
+++ b/client/package.json
@@ -15,6 +15,7 @@
     "@types/react-dom": "^16.9.0",
     "@types/react-router": "^5.1.8",
     "@types/react-router-dom": "^5.1.5",
+    "@types/uuid": "^8.3.0",
     "jsurl": "^0.1.5",
     "lodash": "^4.17.20",
     "material-table": "^1.69.0",
diff --git a/client/src/components/common/MenuEditText.tsx b/client/src/components/common/MenuEditText.tsx
new file mode 100644
index 0000000..5939000
--- /dev/null
+++ b/client/src/components/common/MenuEditText.tsx
@@ -0,0 +1,23 @@
+import React, { useState } from 'react';
+import { TextField } from '@material-ui/core';
+
+export default function MenuEditText(props: {
+    label: string,
+    onSubmit: (s: string) => void,
+}) {
+    const [input, setInput] = useState("");
+
+    return <TextField
+        label={props.label}
+        variant="outlined"
+        value={input}
+        onChange={(e: any) => setInput(e.target.value)}
+        onKeyDown={(e: any) => {
+            if (e.key === 'Enter') {
+                // User submitted free-form value.
+                props.onSubmit(input);
+                e.preventDefault();
+            }
+        }}
+    />
+}
\ No newline at end of file
diff --git a/client/src/components/windows/manage_tags/ManageTagMenu.tsx b/client/src/components/windows/manage_tags/ManageTagMenu.tsx
index 19a0fef..f1dde4c 100644
--- a/client/src/components/windows/manage_tags/ManageTagMenu.tsx
+++ b/client/src/components/windows/manage_tags/ManageTagMenu.tsx
@@ -1,29 +1,7 @@
 import React, { useState } from 'react';
 import { Menu, MenuItem, TextField, Input } from '@material-ui/core';
 import NestedMenuItem from "material-ui-nested-menu-item";
-
-export function MenuEditText(props: {
-    label: string,
-    onSubmit: (s: string) => void,
-}) {
-    const [input, setInput] = useState("");
-
-    return <TextField
-        label={props.label}
-        variant="outlined"
-        value={input}
-        onChange={(e: any) => setInput(e.target.value)}
-        onKeyDown={(e: any) => {
-            // Prevent the event from propagating, because
-            // that would trigger keyboard navigation of the menu.
-            e.stopPropagation();
-            if (e.key === 'Enter') {
-                // User submitted free-form value.
-                props.onSubmit(input);
-            }
-        }}
-    />
-}
+import MenuEditText from '../../common/MenuEditText';
 
 export function PickTag(props: {
     tags: any[]
diff --git a/client/src/components/windows/manage_tags/ManageTagsWindow.tsx b/client/src/components/windows/manage_tags/ManageTagsWindow.tsx
index 08380f6..d2ed83b 100644
--- a/client/src/components/windows/manage_tags/ManageTagsWindow.tsx
+++ b/client/src/components/windows/manage_tags/ManageTagsWindow.tsx
@@ -1,13 +1,14 @@
 import React, { useEffect, useState } from 'react';
 import { WindowState } from '../Windows';
-import { Box, Typography, Chip, IconButton, useTheme } from '@material-ui/core';
-import * as serverApi from '../../../api';
+import { Box, Typography, Chip, IconButton, useTheme, Button } from '@material-ui/core';
 import LoyaltyIcon from '@material-ui/icons/Loyalty';
 import ArrowRightIcon from '@material-ui/icons/ArrowRight';
 import ArrowDropDownIcon from '@material-ui/icons/ArrowDropDown';
 import ManageTagMenu from './ManageTagMenu';
 import ControlTagChanges, { TagChange, TagChangeType } from './TagChange';
 import { queryTags } from '../../../lib/query/Backend';
+import NewTagMenu from './NewTagMenu';
+import { v4 as genUuid } from 'uuid';
 var _ = require('lodash');
 
 export interface ManageTagsWindowState extends WindowState {
@@ -78,6 +79,24 @@ export async function getAllTags() {
     })();
 }
 
+export function ExpandArrow(props: {
+    expanded: boolean,
+    onSetExpanded: (v: boolean) => void,
+}) {
+    return props.expanded ?
+        <IconButton size="small" onClick={() => props.onSetExpanded(false)}><ArrowDropDownIcon /></IconButton> :
+        <IconButton size="small" onClick={() => props.onSetExpanded(true)}><ArrowRightIcon /></IconButton>;
+}
+
+export function CreateTagButton(props: any) {
+    return <Box display="flex">
+        <Box visibility='hidden'>
+            <ExpandArrow expanded={false} onSetExpanded={(v: boolean) => { }} />
+        </Box>
+        <Button style={{ textTransform: 'none' }} variant="outlined" {...props}>New Tag...</Button>
+    </Box>
+}
+
 export function SingleTag(props: {
     tag: any,
     prependElems: any[],
@@ -89,7 +108,7 @@ export function SingleTag(props: {
     const hasChildren = 'children' in tag && tag.children.length > 0;
 
     const [menuPos, setMenuPos] = React.useState<null | number[]>(null);
-    const [expanded, setExpanded] = useState<Boolean>(false);
+    const [expanded, setExpanded] = useState<boolean>(false);
     const theme = useTheme();
 
     const onOpenMenu = (e: any) => {
@@ -106,10 +125,6 @@ export function SingleTag(props: {
         tagLabel = <><del style={{ color: theme.palette.text.secondary }}>{tag.name}</del></>;
     }
 
-    const expandArrow = expanded ?
-        <IconButton size="small" onClick={() => setExpanded(false)}><ArrowDropDownIcon /></IconButton> :
-        <IconButton size="small" onClick={() => setExpanded(true)}><ArrowRightIcon /></IconButton>;
-
     const TagChip = (props: any) => <Box
         style={{ opacity: props.transparent ? 0.5 : 1.0 }}
     >
@@ -123,7 +138,7 @@ export function SingleTag(props: {
     return <>
         <Box display="flex" alignItems="center">
             <Box visibility={hasChildren ? 'visible' : 'hidden'}>
-                {expandArrow}
+                <ExpandArrow expanded={expanded} onSetExpanded={setExpanded} />
             </Box>
             {props.prependElems}
             <TagChip transparent={tag.proposeDelete} label={tagLabel} />
@@ -189,7 +204,7 @@ export function SingleTag(props: {
 }
 
 function annotateTagsWithChanges(tags: Record<string, any>, changes: TagChange[]) {
-    var retval: Record<string, any> = tags;
+    var retval: Record<string, any> = _.cloneDeep(tags);
 
     const applyDelete = (id: string) => {
         retval[id].proposeDelete = true;
@@ -208,6 +223,18 @@ function annotateTagsWithChanges(tags: Record<string, any>, changes: TagChange[]
             case TagChangeType.MoveTo:
                 retval[change.id].proposedParent = change.parent;
                 break;
+            case TagChangeType.Create:
+                retval[change.id] = {
+                    isNewTag: true,
+                    name: change.name,
+                    parentId: change.parent,
+                    tagId: change.id,
+                }
+                if (change.parent) {
+                    retval[change.parent].childIds =
+                        [...retval[change.parent].childIds, change.id]
+                }
+                break;
             default:
                 throw new Error("Unimplemented tag change")
         }
@@ -236,6 +263,18 @@ function applyTagsChanges(tags: Record<string, any>, changes: TagChange[]) {
                 retval[change.id].parentId = change.parent;
                 if (change.parent === null) { delete retval[change.id].parentId; }
                 break;
+            case TagChangeType.Create:
+                retval[change.id] = {
+                    name: change.name,
+                    tagId: change.id,
+                    parentId: change.parent,
+                    isNewTag: true,
+                }
+                if (change.parent) {
+                    retval[change.parent].childIds =
+                        [...retval[change.parent].childIds, change.id]
+                }
+                break;
             default:
                 throw new Error("Unimplemented tag change")
         }
@@ -248,6 +287,15 @@ export default function ManageTagsWindow(props: {
     dispatch: (action: any) => void,
     mainDispatch: (action: any) => void,
 }) {
+    const [newTagMenuPos, setNewTagMenuPos] = React.useState<null | number[]>(null);
+
+    const onOpenNewTagMenu = (e: any) => {
+        setNewTagMenuPos([e.clientX, e.clientY])
+    };
+    const onCloseNewTagMenu = () => {
+        setNewTagMenuPos(null);
+    };
+
     useEffect(() => {
         if (props.state.fetchedTags !== null) {
             return;
@@ -269,50 +317,73 @@ export default function ManageTagsWindow(props: {
         null);
     const tags = organiseTags(tagsWithChanges, null);
 
-    return <Box width="100%" justifyContent="center" display="flex" flexWrap="wrap">
-        <Box
-            m={1}
-            mt={4}
-            width="80%"
-        >
-            <LoyaltyIcon style={{ fontSize: 80 }} />
-        </Box>
-        <Box
-            m={1}
-            mt={4}
-            width="80%"
-        >
-            <Typography variant="h4">Manage Tags</Typography>
-        </Box>
-        {props.state.pendingChanges.length > 0 && <Box
-            m={1}
-            mt={4}
-            width="80%"
-        >
-            <ControlTagChanges
-                changes={props.state.pendingChanges}
-                onDiscard={() => props.dispatch({
-                    type: ManageTagsWindowActions.SetPendingChanges,
-                    value: [],
+    return <>
+        <Box width="100%" justifyContent="center" display="flex" flexWrap="wrap">
+            <Box
+                m={1}
+                mt={4}
+                width="80%"
+            >
+                <LoyaltyIcon style={{ fontSize: 80 }} />
+            </Box>
+            <Box
+                m={1}
+                mt={4}
+                width="80%"
+            >
+                <Typography variant="h4">Manage Tags</Typography>
+            </Box>
+            {props.state.pendingChanges.length > 0 && <Box
+                m={1}
+                mt={4}
+                width="80%"
+            >
+                <ControlTagChanges
+                    changes={props.state.pendingChanges}
+                    onDiscard={() => props.dispatch({
+                        type: ManageTagsWindowActions.SetPendingChanges,
+                        value: [],
+                    })}
+                    onSave={() => { }}
+                    getTagDetails={(id: string) => tagsWithChanges[id]}
+                />
+            </Box>}
+            <Box
+                m={1}
+                mt={4}
+                width="80%"
+            >
+                {tags && tags.length && tags.map((tag: any) => {
+                    return <SingleTag
+                        tag={tag}
+                        prependElems={[]}
+                        dispatch={props.dispatch}
+                        state={props.state}
+                        changedTags={changedTags}
+                    />;
                 })}
-                onSave={() => { }}
-                getTagDetails={(id: string) => tagsWithChanges[id]}
-            />
-        </Box>}
-        <Box
-            m={1}
-            mt={4}
-            width="80%"
-        >
-            {tags && tags.length && tags.map((tag: any) => {
-                return <SingleTag
-                    tag={tag}
-                    prependElems={[]}
-                    dispatch={props.dispatch}
-                    state={props.state}
-                    changedTags={changedTags}
-                />;
-            })}
+                <Box mt={3}><CreateTagButton onClick={(e: any) => { onOpenNewTagMenu(e) }} /></Box>
+            </Box>
         </Box>
-    </Box>
+        <NewTagMenu
+            position={newTagMenuPos}
+            open={newTagMenuPos !== null}
+            onCreate={(name: string, parentId: string | null) => {
+                props.dispatch({
+                    type: ManageTagsWindowActions.SetPendingChanges,
+                    value: [
+                        ...props.state.pendingChanges,
+                        {
+                            type: TagChangeType.Create,
+                            id: genUuid(),
+                            parent: parentId,
+                            name: name,
+                        }
+                    ]
+                })
+            }}
+            onClose={onCloseNewTagMenu}
+            changedTags={changedTags}
+        />
+    </>
 }
\ No newline at end of file
diff --git a/client/src/components/windows/manage_tags/NewTagMenu.tsx b/client/src/components/windows/manage_tags/NewTagMenu.tsx
new file mode 100644
index 0000000..3d16315
--- /dev/null
+++ b/client/src/components/windows/manage_tags/NewTagMenu.tsx
@@ -0,0 +1,54 @@
+import React, { useState } from 'react';
+import { Menu, MenuItem, TextField, Input } from '@material-ui/core';
+import NestedMenuItem from "material-ui-nested-menu-item";
+import MenuEditText from '../../common/MenuEditText';
+
+export function PickCreateTag(props: {
+    tags: any[],
+    open: boolean,
+    parentId: string | null,
+    onCreate: (name: string, parentId: string | null) => void,
+}) {
+
+    return <>
+        <MenuEditText
+            label="Name"
+            onSubmit={(s: string) => {
+                props.onCreate(s, props.parentId);
+            }}
+        />
+        {props.tags.map((tag: any) => {
+            return <NestedMenuItem
+                parentMenuOpen={props.open}
+                label={tag.name}
+            >
+                <PickCreateTag tags={tag.children} open={props.open} parentId={tag.tagId} onCreate={props.onCreate} />
+            </NestedMenuItem>
+        })}
+    </>
+}
+
+export default function NewTagMenu(props: {
+    position: null | number[],
+    open: boolean,
+    onCreate: (name: string, parentId: string | null) => void,
+    onClose: () => void,
+    changedTags: any[], // Tags organized hierarchically with "children" fields
+}) {
+    const pos = props.open && props.position ?
+        { left: props.position[0], top: props.position[1] }
+        : { left: 0, top: 0 }
+
+    return <Menu
+        open={props.open}
+        anchorReference="anchorPosition"
+        anchorPosition={pos}
+        keepMounted
+        onClose={props.onClose}
+    >
+        <PickCreateTag tags={props.changedTags} open={props.open} parentId={null} onCreate={(n: string, v: string | null) => {
+            props.onClose();
+            props.onCreate(n, v);
+        }} />
+    </Menu>
+}
\ No newline at end of file
diff --git a/client/src/components/windows/manage_tags/TagChange.tsx b/client/src/components/windows/manage_tags/TagChange.tsx
index 3b17e46..f5c2838 100644
--- a/client/src/components/windows/manage_tags/TagChange.tsx
+++ b/client/src/components/windows/manage_tags/TagChange.tsx
@@ -26,7 +26,7 @@ export function TagChangeDisplay(props: {
     getTagDetails: (id: string) => any,
 }) {
     const tag = props.getTagDetails(props.change.id);
-    const oldParent = tag.parentId ? props.getTagDetails(tag.parentId.toString()) : null;
+    const oldParent = tag.parentId ? props.getTagDetails(tag.parentId) : null;
     const newParent = props.change.parent ? props.getTagDetails(props.change.parent) : null;
 
     const MakeTag = (props: { name: string }) => <Chip label={props.name} />
@@ -50,6 +50,10 @@ export function TagChangeDisplay(props: {
                 <MakeTag name={newParent ? newParent.name : "/"} /> :
                 <CircularProgress />;
             return <Typography>Move {MainTag} from {OldParent} to {NewParent}</Typography>
+        case TagChangeType.Create:
+            return props.change.parent ?
+                <Typography>Create {MainTag} under <MakeTag name={newParent.name}/></Typography> :
+                <Typography>Create {MainTag}</Typography>
         default:
             throw new Error("Unhandled tag change type")
     }