diff --git a/packages/excalidraw/actions/actionCanvas.tsx b/packages/excalidraw/actions/actionCanvas.tsx
index 80a9eedaac..512aec733b 100644
--- a/packages/excalidraw/actions/actionCanvas.tsx
+++ b/packages/excalidraw/actions/actionCanvas.tsx
@@ -51,7 +51,7 @@ import { register } from "./register";
 
 import type { AppState, Offsets } from "../types";
 
-export const actionChangeViewBackgroundColor = register({
+export const actionChangeViewBackgroundColor = register<Partial<AppState>>({
   name: "changeViewBackgroundColor",
   label: "labels.canvasBackground",
   trackEvent: false,
@@ -64,7 +64,7 @@ export const actionChangeViewBackgroundColor = register({
   perform: (_, appState, value) => {
     return {
       appState: { ...appState, ...value },
-      captureUpdate: !!value.viewBackgroundColor
+      captureUpdate: !!value?.viewBackgroundColor
         ? CaptureUpdateAction.IMMEDIATELY
         : CaptureUpdateAction.EVENTUALLY,
     };
@@ -463,7 +463,7 @@ export const actionZoomToFit = register({
     !event[KEYS.CTRL_OR_CMD],
 });
 
-export const actionToggleTheme = register({
+export const actionToggleTheme = register<AppState["theme"]>({
   name: "toggleTheme",
   label: (_, appState) => {
     return appState.theme === THEME.DARK
diff --git a/packages/excalidraw/actions/actionClipboard.tsx b/packages/excalidraw/actions/actionClipboard.tsx
index d9b011d2bc..8d5ed2a30a 100644
--- a/packages/excalidraw/actions/actionClipboard.tsx
+++ b/packages/excalidraw/actions/actionClipboard.tsx
@@ -20,12 +20,12 @@ import { t } from "../i18n";
 import { actionDeleteSelected } from "./actionDeleteSelected";
 import { register } from "./register";
 
-export const actionCopy = register({
+export const actionCopy = register<ClipboardEvent | null>({
   name: "copy",
   label: "labels.copy",
   icon: DuplicateIcon,
   trackEvent: { category: "element" },
-  perform: async (elements, appState, event: ClipboardEvent | null, app) => {
+  perform: async (elements, appState, event, app) => {
     const elementsToCopy = app.scene.getSelectedElements({
       selectedElementIds: appState.selectedElementIds,
       includeBoundTextElement: true,
@@ -109,12 +109,12 @@ export const actionPaste = register({
   keyTest: undefined,
 });
 
-export const actionCut = register({
+export const actionCut = register<ClipboardEvent | null>({
   name: "cut",
   label: "labels.cut",
   icon: cutIcon,
   trackEvent: { category: "element" },
-  perform: (elements, appState, event: ClipboardEvent | null, app) => {
+  perform: (elements, appState, event, app) => {
     actionCopy.perform(elements, appState, event, app);
     return actionDeleteSelected.perform(elements, appState, null, app);
   },
diff --git a/packages/excalidraw/actions/actionExport.tsx b/packages/excalidraw/actions/actionExport.tsx
index 908e2463e9..1604d3849c 100644
--- a/packages/excalidraw/actions/actionExport.tsx
+++ b/packages/excalidraw/actions/actionExport.tsx
@@ -31,7 +31,9 @@ import "../components/ToolIcon.scss";
 
 import { register } from "./register";
 
-export const actionChangeProjectName = register({
+import type { AppState } from "../types";
+
+export const actionChangeProjectName = register<AppState["name"]>({
   name: "changeProjectName",
   label: "labels.fileTitle",
   trackEvent: false,
@@ -51,7 +53,7 @@ export const actionChangeProjectName = register({
   ),
 });
 
-export const actionChangeExportScale = register({
+export const actionChangeExportScale = register<AppState["exportScale"]>({
   name: "changeExportScale",
   label: "imageExportDialog.scale",
   trackEvent: { category: "export", action: "scale" },
@@ -101,7 +103,9 @@ export const actionChangeExportScale = register({
   },
 });
 
-export const actionChangeExportBackground = register({
+export const actionChangeExportBackground = register<
+  AppState["exportBackground"]
+>({
   name: "changeExportBackground",
   label: "imageExportDialog.label.withBackground",
   trackEvent: { category: "export", action: "toggleBackground" },
@@ -121,7 +125,9 @@ export const actionChangeExportBackground = register({
   ),
 });
 
-export const actionChangeExportEmbedScene = register({
+export const actionChangeExportEmbedScene = register<
+  AppState["exportEmbedScene"]
+>({
   name: "changeExportEmbedScene",
   label: "imageExportDialog.tooltip.embedScene",
   trackEvent: { category: "export", action: "embedScene" },
@@ -288,7 +294,9 @@ export const actionLoadScene = register({
   keyTest: (event) => event[KEYS.CTRL_OR_CMD] && event.key === KEYS.O,
 });
 
-export const actionExportWithDarkMode = register({
+export const actionExportWithDarkMode = register<
+  AppState["exportWithDarkMode"]
+>({
   name: "exportWithDarkMode",
   label: "imageExportDialog.label.darkMode",
   trackEvent: { category: "export", action: "toggleTheme" },
diff --git a/packages/excalidraw/actions/actionFinalize.tsx b/packages/excalidraw/actions/actionFinalize.tsx
index 0c597f80d8..9730c022f9 100644
--- a/packages/excalidraw/actions/actionFinalize.tsx
+++ b/packages/excalidraw/actions/actionFinalize.tsx
@@ -43,7 +43,12 @@ import { register } from "./register";
 
 import type { AppState } from "../types";
 
-export const actionFinalize = register({
+type FormData = {
+  event: PointerEvent;
+  sceneCoords: { x: number; y: number };
+};
+
+export const actionFinalize = register<FormData>({
   name: "finalize",
   label: "",
   trackEvent: false,
diff --git a/packages/excalidraw/actions/actionNavigate.tsx b/packages/excalidraw/actions/actionNavigate.tsx
index 27f0d6024c..02dcecef50 100644
--- a/packages/excalidraw/actions/actionNavigate.tsx
+++ b/packages/excalidraw/actions/actionNavigate.tsx
@@ -2,6 +2,8 @@ import clsx from "clsx";
 
 import { CaptureUpdateAction } from "@excalidraw/element";
 
+import { invariant } from "@excalidraw/common";
+
 import { getClientColor } from "../clients";
 import { Avatar } from "../components/Avatar";
 import {
@@ -16,12 +18,17 @@ import { register } from "./register";
 import type { GoToCollaboratorComponentProps } from "../components/UserList";
 import type { Collaborator } from "../types";
 
-export const actionGoToCollaborator = register({
+export const actionGoToCollaborator = register<Collaborator>({
   name: "goToCollaborator",
   label: "Go to a collaborator",
   viewMode: true,
   trackEvent: { category: "collab" },
-  perform: (_elements, appState, collaborator: Collaborator) => {
+  perform: (_elements, appState, collaborator) => {
+    invariant(
+      collaborator,
+      "actionGoToCollaborator: collaborator should be defined when actionGoToCollaborator is called",
+    );
+
     if (
       !collaborator.socketId ||
       appState.userToFollow?.socketId === collaborator.socketId ||
diff --git a/packages/excalidraw/actions/actionProperties.tsx b/packages/excalidraw/actions/actionProperties.tsx
index 7502404d70..75a7bbd8a1 100644
--- a/packages/excalidraw/actions/actionProperties.tsx
+++ b/packages/excalidraw/actions/actionProperties.tsx
@@ -1,4 +1,5 @@
 import { pointFrom } from "@excalidraw/math";
+
 import { useEffect, useMemo, useRef, useState } from "react";
 
 import {
@@ -21,6 +22,7 @@ import {
   getLineHeight,
   isTransparent,
   reduceToCommonValue,
+  invariant,
 } from "@excalidraw/common";
 
 import { canBecomePolygon, getNonDeletedElements } from "@excalidraw/element";
@@ -292,13 +294,15 @@ const changeFontSize = (
 
 // -----------------------------------------------------------------------------
 
-export const actionChangeStrokeColor = register({
+export const actionChangeStrokeColor = register<
+  Pick<AppState, "currentItemStrokeColor">
+>({
   name: "changeStrokeColor",
   label: "labels.stroke",
   trackEvent: false,
   perform: (elements, appState, value) => {
     return {
-      ...(value.currentItemStrokeColor && {
+      ...(value?.currentItemStrokeColor && {
         elements: changeProperty(
           elements,
           appState,
@@ -316,7 +320,7 @@ export const actionChangeStrokeColor = register({
         ...appState,
         ...value,
       },
-      captureUpdate: !!value.currentItemStrokeColor
+      captureUpdate: !!value?.currentItemStrokeColor
         ? CaptureUpdateAction.IMMEDIATELY
         : CaptureUpdateAction.EVENTUALLY,
     };
@@ -346,12 +350,14 @@ export const actionChangeStrokeColor = register({
   ),
 });
 
-export const actionChangeBackgroundColor = register({
+export const actionChangeBackgroundColor = register<
+  Pick<AppState, "currentItemBackgroundColor" | "viewBackgroundColor">
+>({
   name: "changeBackgroundColor",
   label: "labels.changeBackground",
   trackEvent: false,
   perform: (elements, appState, value, app) => {
-    if (!value.currentItemBackgroundColor) {
+    if (!value?.currentItemBackgroundColor) {
       return {
         appState: {
           ...appState,
@@ -423,7 +429,7 @@ export const actionChangeBackgroundColor = register({
   ),
 });
 
-export const actionChangeFillStyle = register({
+export const actionChangeFillStyle = register<ExcalidrawElement["fillStyle"]>({
   name: "changeFillStyle",
   label: "labels.fill",
   trackEvent: false,
@@ -503,7 +509,9 @@ export const actionChangeFillStyle = register({
   },
 });
 
-export const actionChangeStrokeWidth = register({
+export const actionChangeStrokeWidth = register<
+  ExcalidrawElement["strokeWidth"]
+>({
   name: "changeStrokeWidth",
   label: "labels.strokeWidth",
   trackEvent: false,
@@ -559,7 +567,7 @@ export const actionChangeStrokeWidth = register({
   ),
 });
 
-export const actionChangeSloppiness = register({
+export const actionChangeSloppiness = register<ExcalidrawElement["roughness"]>({
   name: "changeSloppiness",
   label: "labels.sloppiness",
   trackEvent: false,
@@ -613,7 +621,9 @@ export const actionChangeSloppiness = register({
   ),
 });
 
-export const actionChangeStrokeStyle = register({
+export const actionChangeStrokeStyle = register<
+  ExcalidrawElement["strokeStyle"]
+>({
   name: "changeStrokeStyle",
   label: "labels.strokeStyle",
   trackEvent: false,
@@ -666,7 +676,7 @@ export const actionChangeStrokeStyle = register({
   ),
 });
 
-export const actionChangeOpacity = register({
+export const actionChangeOpacity = register<ExcalidrawElement["opacity"]>({
   name: "changeOpacity",
   label: "labels.opacity",
   trackEvent: false,
@@ -690,78 +700,89 @@ export const actionChangeOpacity = register({
   ),
 });
 
-export const actionChangeFontSize = register({
-  name: "changeFontSize",
-  label: "labels.fontSize",
-  trackEvent: false,
-  perform: (elements, appState, value, app) => {
-    return changeFontSize(elements, appState, app, () => value, value);
+export const actionChangeFontSize = register<ExcalidrawTextElement["fontSize"]>(
+  {
+    name: "changeFontSize",
+    label: "labels.fontSize",
+    trackEvent: false,
+    perform: (elements, appState, value, app) => {
+      return changeFontSize(
+        elements,
+        appState,
+        app,
+        () => {
+          invariant(value, "actionChangeFontSize: Expected a font size value");
+          return value;
+        },
+        value,
+      );
+    },
+    PanelComponent: ({ elements, appState, updateData, app }) => (
+      <fieldset>
+        <legend>{t("labels.fontSize")}</legend>
+        <div className="buttonList">
+          <RadioSelection
+            group="font-size"
+            options={[
+              {
+                value: 16,
+                text: t("labels.small"),
+                icon: FontSizeSmallIcon,
+                testId: "fontSize-small",
+              },
+              {
+                value: 20,
+                text: t("labels.medium"),
+                icon: FontSizeMediumIcon,
+                testId: "fontSize-medium",
+              },
+              {
+                value: 28,
+                text: t("labels.large"),
+                icon: FontSizeLargeIcon,
+                testId: "fontSize-large",
+              },
+              {
+                value: 36,
+                text: t("labels.veryLarge"),
+                icon: FontSizeExtraLargeIcon,
+                testId: "fontSize-veryLarge",
+              },
+            ]}
+            value={getFormValue(
+              elements,
+              app,
+              (element) => {
+                if (isTextElement(element)) {
+                  return element.fontSize;
+                }
+                const boundTextElement = getBoundTextElement(
+                  element,
+                  app.scene.getNonDeletedElementsMap(),
+                );
+                if (boundTextElement) {
+                  return boundTextElement.fontSize;
+                }
+                return null;
+              },
+              (element) =>
+                isTextElement(element) ||
+                getBoundTextElement(
+                  element,
+                  app.scene.getNonDeletedElementsMap(),
+                ) !== null,
+              (hasSelection) =>
+                hasSelection
+                  ? null
+                  : appState.currentItemFontSize || DEFAULT_FONT_SIZE,
+            )}
+            onChange={(value) => updateData(value)}
+          />
+        </div>
+      </fieldset>
+    ),
   },
-  PanelComponent: ({ elements, appState, updateData, app }) => (
-    <fieldset>
-      <legend>{t("labels.fontSize")}</legend>
-      <div className="buttonList">
-        <RadioSelection
-          group="font-size"
-          options={[
-            {
-              value: 16,
-              text: t("labels.small"),
-              icon: FontSizeSmallIcon,
-              testId: "fontSize-small",
-            },
-            {
-              value: 20,
-              text: t("labels.medium"),
-              icon: FontSizeMediumIcon,
-              testId: "fontSize-medium",
-            },
-            {
-              value: 28,
-              text: t("labels.large"),
-              icon: FontSizeLargeIcon,
-              testId: "fontSize-large",
-            },
-            {
-              value: 36,
-              text: t("labels.veryLarge"),
-              icon: FontSizeExtraLargeIcon,
-              testId: "fontSize-veryLarge",
-            },
-          ]}
-          value={getFormValue(
-            elements,
-            app,
-            (element) => {
-              if (isTextElement(element)) {
-                return element.fontSize;
-              }
-              const boundTextElement = getBoundTextElement(
-                element,
-                app.scene.getNonDeletedElementsMap(),
-              );
-              if (boundTextElement) {
-                return boundTextElement.fontSize;
-              }
-              return null;
-            },
-            (element) =>
-              isTextElement(element) ||
-              getBoundTextElement(
-                element,
-                app.scene.getNonDeletedElementsMap(),
-              ) !== null,
-            (hasSelection) =>
-              hasSelection
-                ? null
-                : appState.currentItemFontSize || DEFAULT_FONT_SIZE,
-          )}
-          onChange={(value) => updateData(value)}
-        />
-      </div>
-    </fieldset>
-  ),
-});
+);
 
 export const actionDecreaseFontSize = register({
   name: "decreaseFontSize",
@@ -821,7 +842,10 @@ type ChangeFontFamilyData = Partial<
   resetContainers?: true;
 };
 
-export const actionChangeFontFamily = register({
+export const actionChangeFontFamily = register<{
+  currentItemFontFamily: any;
+  currentHoveredFontFamily: any;
+}>({
   name: "changeFontFamily",
   label: "labels.fontFamily",
   trackEvent: false,
@@ -858,6 +882,8 @@ export const actionChangeFontFamily = register({
       };
     }
 
+    invariant(value, "actionChangeFontFamily: value must be defined");
+
     const { currentItemFontFamily, currentHoveredFontFamily } = value;
 
     let nextCaptureUpdateAction: CaptureUpdateActionType =
@@ -1191,7 +1217,7 @@ export const actionChangeFontFamily = register({
   },
 });
 
-export const actionChangeTextAlign = register({
+export const actionChangeTextAlign = register<TextAlign>({
   name: "changeTextAlign",
   label: "Change text alignment",
   trackEvent: false,
@@ -1283,7 +1309,7 @@ export const actionChangeTextAlign = register({
   },
 });
 
-export const actionChangeVerticalAlign = register({
+export const actionChangeVerticalAlign = register<VerticalAlign>({
   name: "changeVerticalAlign",
   label: "Change vertical alignment",
   trackEvent: { category: "element" },
@@ -1375,7 +1401,7 @@ export const actionChangeVerticalAlign = register({
   },
 });
 
-export const actionChangeRoundness = register({
+export const actionChangeRoundness = register<"sharp" | "round">({
   name: "changeRoundness",
   label: "Change edge roundness",
   trackEvent: false,
@@ -1532,15 +1558,16 @@ const getArrowheadOptions = (flip: boolean) => {
   ] as const;
 };
 
-export const actionChangeArrowhead = register({
+export const actionChangeArrowhead = register<{
+  position: "start" | "end";
+  type: Arrowhead;
+}>({
   name: "changeArrowhead",
   label: "Change arrowheads",
   trackEvent: false,
-  perform: (
-    elements,
-    appState,
-    value: { position: "start" | "end"; type: Arrowhead },
-  ) => {
+  perform: (elements, appState, value) => {
+    invariant(value, "actionChangeArrowhead: value must be defined");
+
     return {
       elements: changeProperty(elements, appState, (el) => {
         if (isLinearElement(el)) {
@@ -1616,7 +1643,7 @@ export const actionChangeArrowhead = register({
   },
 });
 
-export const actionChangeArrowType = register({
+export const actionChangeArrowType = register<keyof typeof ARROW_TYPE>({
   name: "changeArrowType",
   label: "Change arrow types",
   trackEvent: false,
diff --git a/packages/excalidraw/actions/register.ts b/packages/excalidraw/actions/register.ts
index 7c841e3aee..8f22810393 100644
--- a/packages/excalidraw/actions/register.ts
+++ b/packages/excalidraw/actions/register.ts
@@ -2,7 +2,12 @@ import type { Action } from "./types";
 
 export let actions: readonly Action[] = [];
 
-export const register = <T extends Action>(action: T) => {
+export const register = <
+  TData extends any,
+  T extends Action<TData> = Action<TData>,
+>(
+  action: T,
+) => {
   actions = actions.concat(action);
   return action as T & {
     keyTest?: unknown extends T["keyTest"] ? never : T["keyTest"];
diff --git a/packages/excalidraw/actions/types.ts b/packages/excalidraw/actions/types.ts
index e6f3631263..0a91bc625a 100644
--- a/packages/excalidraw/actions/types.ts
+++ b/packages/excalidraw/actions/types.ts
@@ -32,10 +32,10 @@ export type ActionResult =
     }
   | false;
 
-type ActionFn = (
+type ActionFn<TData = any> = (
   elements: readonly OrderedExcalidrawElement[],
   appState: Readonly<AppState>,
-  formData: any,
+  formData: TData | undefined,
   app: AppClassProperties,
 ) => ActionResult | Promise<ActionResult>;
 
@@ -158,7 +158,7 @@ export type PanelComponentProps = {
   ) => React.JSX.Element | null;
 };
 
-export interface Action {
+export interface Action<TData = any> {
   name: ActionName;
   label:
     | string
@@ -175,7 +175,7 @@ export interface Action {
         elements: readonly ExcalidrawElement[],
       ) => React.ReactNode);
   PanelComponent?: React.FC<PanelComponentProps>;
-  perform: ActionFn;
+  perform: ActionFn<TData>;
   keyPriority?: number;
   keyTest?: (
     event: React.KeyboardEvent | KeyboardEvent,
diff --git a/packages/excalidraw/components/App.tsx b/packages/excalidraw/components/App.tsx
index 7faf954799..aa908a6ba7 100644
--- a/packages/excalidraw/components/App.tsx
+++ b/packages/excalidraw/components/App.tsx
@@ -8009,7 +8009,11 @@ class App extends React.Component<AppProps, AppState> {
           ) < LINE_CONFIRM_THRESHOLD)
       ) {
         this.actionManager.executeAction(actionFinalize, "ui", {
-          event,
+          event: event.nativeEvent,
+          sceneCoords: {
+            x: pointerDownState.origin.x,
+            y: pointerDownState.origin.y,
+          },
         });
         return;
       }