Dell S2421HS/S2421HSX/S2721HS/
S2721HSX
Dell Display Manager
User’s Guide
Model: S2421HS/S2421HSX/S2721HS/S2721HSX
Regulatory model: S2421Ht/S2721Ht
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
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
| 3
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 notication tray. Information about displays connected to the system is available when
hovering over the notication-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
Brightness/Contrast
Input Source
Color
Display
Menu
Personalize
Others
Display Info
DDC/CI
LCD Conditioning
Firmware
Service Tag
Reset Others
Factory Reset
On
O
4 | Overview
Using the Quick Settings Dialog
Clicking Dell Display Manager’s notication tray icon to open the Quick Settings dialog box.
When more than one supported Dell displays are connected to the computer, a specic 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
Using the Quick Settings Dialog | 5
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, congure 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.
6 | Using the Quick Settings Dialog
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.
Setting Basic Display Functions | 7
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