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Model: S2421HS/S2421HSX/S2721HS/S2721HSX

Regulatory model: S2421Ht/S2721Ht

Dell S2421HS/S2421HSX/S2721HS/

S2721HSX

Dell Display Manager

User’s Guide

NOTE: A NOTE indicates important information that helps you make better use of

your computer.

Copyright © 2020 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC, and other trademarks

are trademarks of Dell Inc. or its subsidiaries. Other trademarks may be trademarks of their respective

owners.

2020 – 07

Rev. X01

| 3

Contents

Overview .........................................4

Using the Quick Settings Dialog........................5

Setting Basic Display Functions ........................7

Assigning Preset Modes to Applications .................9

Organizing Windows with Easy Arrange................. 11

Managing Multiple Video Inputs.......................15

Restoring Application Positions .......................17

Applying Energy Conservation Features ................18

Other Shortcut Keys ...............................19

Attach DDM To Active Window (Only Windows 10) ........20

Troubleshooting ...................................21

Contents | 3

4| Overview

Overview

Dell Display Manager is a Microsoft Windows application used to manage a display or a group of

displays. It enables manual adjustment of the displayed image, assignment of automatic settings,

energy management, window organization, image rotation, and other features on selected Dell

displays. After installed, Dell Display Manager runs each time the system starts and places its

icon in the notication tray. Information about displays connected to the system is available when

hovering over the notication-tray icon.

Dell S2421HS/S2421HSX - Standard

S2421HS/S2421HSX

Dell S2721HS/S2721HSX - Standard

S2721HS/S2721HSX

NOTE: Dell Display Manager uses DDC/CI channel to communicate with your

display. Ensure that DDC/CI is enabled in the menu as below.

Dell 24/27 Monitor

Input Source

Color

Personalize

Display

Menu

Others

Brightness/Contrast

O

On

LCD Conditioning

DDC/CI

Firmware

Reset Others

Factory Reset

Display Info

Service Tag

Using the Quick Settings Dialog | 5

Using the Quick Settings Dialog

Clicking Dell Display Manager’s notication tray icon to open the Quick Settings dialog box.

When more than one supported Dell displays are connected to the computer, a specic target

display can be selected using the menu. The Quick Settings dialog box enables convenient

adjustment of the display’s brightness, contrast, resolution, window layout, and so on. You can

select Manual Mode or Auto Mode, and the screen resolution can be changed.

Dell S2421HS/S2421HSX

S2421HS/S2421HSX

6| Using the Quick Settings Dialog

Dell S2721HS/S2721HSX

S2721HS/S2721HSX

The Quick Settings dialog box also provides access to Dell Display Manager’s advanced user

interface that is used to adjust basic functions, congure auto mode and access other features.

NOTE:

Feature Function Description

Quick DDM

Access

Quick key to

call up DDM UI

• Ctrl+Shift+D

• Use Page Up/Page Down key or click on “>” to ip

through all Easy Arrange layouts.

Control

individual

display in

multiple

display setup

• From dropdown box to select display, selected display

has Dell logo shown.

• Perform display self-test feature check.

• Move DDM UI to the display to be controlled.

• Press Ctrl+Shift+D to bring up the miniUI under the

mouse pointer.

Setting Basic Display Functions | 7

Setting Basic Display Functions

You can select Manual Mode that enables you to manually select a preset mode or select

Auto Mode that applies a preset mode based on the active application. An on-screen message

displays the current preset mode whenever it changes. The selected display’s Brightness and

Contrast can also be directly adjusted from the Basic tab.

Dell S2421HS/S2421HSX

S2421HS/S2421HSX

Dell S2721HS/S2721HSX

S2721HS/S2721HSX

NOTE: When multiple Dell displays are connected, select “Enable display matrix

control” to apply brightness, contrast and color presets controls to all displays.

8| Setting Basic Display Functions

Dell S2421HS/S2421HSX

S2421HS/S2421HSX

Dell S2721HS/S2721HSX

S2721HS/S2721HSX

Assigning Preset Modes to Applications | 9

Assigning Preset Modes to Applications

The Auto Mode tab allows you to associate a specic Preset Mode with a specic application,

and apply it automatically. When Auto Mode is enabled, Dell Display Manager automatically

switches to the corresponding Preset Mode whenever the associated application is activated.

The Preset Mode assigned to a particular application may be the same on each connected

display, or it can vary from one display to another.

Dell Display Manager is pre-congured for many popular applications. To add a new application

to the assignment list, simply drag the application from the desktop, Windows Start Menu, or

elsewhere, and drop it onto the current list.

NOTE: Preset Mode assignments for batch files, scripts, loaders, and non-

executable files such as zip archives or packed files, are not supported.

You can also congure the Game preset mode to be used whenever a Direct3D application runs

in full-screen mode. To prevent an application from using mode, assign a dierent preset mode to

it.

Dell S2421HS/S2421HSX

S2421HS/S2421HSX

10 | Assigning Preset Modes to Applications

Dell S2721HS/S2721HSX

S2721HS/S2721HSX