Table of Contents
DELL U3421WE User Manual
Displayed below is the user manual for U3421WE by DELL which is a product in the Computer Monitors category. This manual has pages.
Related Manuals
Dell 34 Monitor - U3421WE
Dell Display Manager
User’s Guide
Model: U3421WE
Regulatory model: U3421WEb
NOTE: A NOTE indicates important information that helps you make
better use of your computer.
CAUTION: A CAUTION indicates potential damage to hardware or loss
of data if instructions are not followed.
WARNING: A WARNING indicates a potential for property damage,
personal injury, or death.
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 - 10
Rev. A00
│ 3
Contents
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Using the Quick Settings Dialog . . . . . . . . . . . . . . . . 5
Setting Basic Display Functions . . . . . . . . . . . . . . . . 6
Assigning Preset Modes to Applications . . . . . . . . . 7
Organizing Windows with Easy Arrange . . . . . . . . . . 8
Managing Multiple Video Inputs. . . . . . . . . . . . . . . 10
Restoring Application Positions . . . . . . . . . . . . . . . 15
Attach DDM to active window
(only Windows 10) . . . . . . . . . . . . . . . . . . . . . . . . . 16
Applying Energy Conservation Features. . . . . . . . . .17
Other Shortcut Keys . . . . . . . . . . . . . . . . . . . . . . . . .17
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4 │ Overview
Overview
Dell Display Manager (DDM) is a Microsoft Windows application used to manage a
monitor or a group of monitors. It allows manual adjustment of the displayed image,
assignment of automatic settings, energy management, window organization,
image rotation, and other features on select Dell monitors. Once installed, Dell
Display Manager runs each time the system starts and places its icon in the
notification tray. Information about monitors connected to the system is available
when hovering over the notification-tray icon.
Alternatively, you may launch DDM by right-clicking on the desktop background to
select Dell Display Manager from the desktop menu.
NOTE: Dell Display Manager uses DDC/CI channel to communicate with
your monitor. Ensure DDC/CI is enabled in the menu as below.
Overview │ 5
Using the Quick Settings Dialog
Clicking Dell Display Manager's notification tray icon opens the Quick Settings
dialog box. When more than one supported Dell monitors are connected to the
computer, a specific target monitor can be selected using the menu. The Quick
Settings dialog box enables you to easily adjust the brightness, contrast, resolution,
window layout, and so on. You can select Manual Mode or Auto Mode, and the
screen resolution can be changed.
The Quick Settings dialog box also provides access to Dell Display Manager's
advanced user interface that is used to adjust basic functions, configure auto mode
and access other features.
6 │ Setting Basic Display Functions
NOTE:
Setting Basic Display Functions
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 monitor's Brightness and Contrast can also be directly adjusted from the
Basic tab.
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 flip through all Easy Arrange
layouts.
Control
individual
monitor in
multiple
monitor setup
• From dropdown box to select monitor,
selected monitor has Dell logo shown.
• Perform monitor self-test feature check.
• Move DDM UI to the monitor to be
controlled.
• Press Ctrl+Shift+D to bring up the miniUI
under the mouse pointer.
Assigning Preset Modes to Applications │ 7
NOTE: When multiple Dell monitors are connected, select “Enable
display matrix control” to apply brightness, contrast and color presets
controls to all monitors.
Assigning Preset Modes to Applications
The Auto Mode tab allows you to associate a specific Preset Mode with a specific
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 monitor, or it can vary from one
monitor to another.
Dell Display Manager is pre-configured 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.
8 │ Organizing Windows with Easy Arrange
You can also configure 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 different preset mode to it.
Organizing Windows with Easy Arrange
Easy Arrange helps you to effectively organize your application windows on the
desktop. You first choose a pre-defined layout pattern which suits your work, then
you just need to drag the application windows into the defined zones. Press “>” or
use Page Up/Page Down key to find more layouts.
To create a custom layout, right-click on the thumbnail with a tiny triangle at the
bottom right corner, arrange the numbers of rows and columns in the open window,
and then click OK to set up your preferred arrangement.
Organizing Windows with Easy Arrange │ 9
For Windows 10, you can apply different window layouts for each of the virtual
desktops.
If you often use Windows snap feature, you can select “Hold down the SHIFT key
to enable zone positioning”. This gives Windows snap priority over Easy
Arrange. You will then need to press the Shift key to use Easy Arrange
positioning.
If you are using multiple monitors in an array or matrix, Easy Arrange layout can be
applied across to all the monitors as one desktop. Select “Span multiple
monitors” to enable this feature. You need to align your monitors properly to make
it effective.
10 │ Managing Multiple Video Inputs
There are other advanced ways for the usage of Easy Arrange. Refer to table
below.
Feature Function Description
Enhanced Easy
Arrange
Custom layouts • Save and name 5 customized Easy
Arrange patterns.
• Configure x*y patterns.
5 MRU (most-
recently-
used) layouts
• Press Ctrl+Shift+Home to cycle among the
last 5 MRU layouts.
On the fly
partition
resizing
• Hold down Ctrl while resizing current Easy
Arrange layout to adjust the size and
numbers of cells in a layout.
• Newly formed Easy Arrange pattern is
saved into the Easy Arrange icon position.
• Hold down Ctrl while clicking on a modified
layout icon to restore it to default layout.
Easy Arrange
layouts for
portrait mode
• Portrait mode Easy Arrange icons are
presented when monitor is rotated.
NOTE: Some application requires a minimum effective resolution for its
window. The application may not fit in an Easy Arrange zone if the zone
is smaller than the required window size.
Managing Multiple Video Inputs
The Input Manager tab provides convenient ways for you to manage multiple
video inputs connected to your Dell monitor. This makes it very easy to switch
between inputs while working with multiple computers.
All video input ports available to your monitor are listed. You can give each input a
name as you like. Please save your changes after editing.
You can define a shortcut key to quickly switch to your favorite input and another
shortcut key to quickly switch between two inputs if you often work between them.
Managing Multiple Video Inputs │ 11
You can use the dropdown list to switch to any input source.
NOTE: DDM communicates with your monitor even when the monitor is
displaying video from another computer. You can install DDM on the PC
you frequently use and control input switching from it. You may also
install DDM on other PCs connected to the monitor.
12 │ Managing Multiple Video Inputs
Click the PIP/PBP mode selection button to set the preferred configuration. The
available modes are Off, PIP Small, PIP Large, and PBP.
You can select video inputs for your main window and sub window. Please save
your change after your selection.
You can define a shortcut key to quickly swap the video inputs between main
window and sub window.
Click Video swap button or use the defined Video swap shortcut key to swap the
video inputs between main window and sub window.
You can assign a USB upstream port with your video input. The assigned USB
upstream port will be connected to the computer when its video is showing on the
monitor.
Managing Multiple Video Inputs │ 13
It is particularly useful when you share mouse or keyboard which is connected to
the monitor between two computers. You can define a shortcut key to quickly
switch the device between the two computers.
You can also use the KVM wizard to assign USB upstream ports to video inputs
and select display partition for multiple devices.
NOTE: Make sure you have assigned a USB upstream port for each of
the connected devices.
14 │ Managing Multiple Video Inputs
When PIP/PBP is on, if you share a device (e.g. a mouse) between the two
computers, you can click USB switch button or use the defined USB switch
shortcut key to quickly switch the device between the two computers.
NOTE: Make sure you have assigned a USB upstream port for each of
the two computers.
NOTE: Make sure the USB device is properly stopped before you switch
it to another computer. Fail to do so may cause problems such as data
corruption on a thumb drive.
Managing Multiple Video Inputs │ 15
Restoring Application Positions
DDM can help you restore application windows into their positions when you
reconnect your PC to the monitor(s). You can quickly access this feature by right-
clicking on DDM icon in the notification tray.
If you choose “Auto-restore window layout”, your application windows' positions
are tracked and remembered by DDM. DDM automatically puts the application
windows into their original positions when you reconnect your PC to your
monitor(s).
To go back to a favorite layout, first “Save current window layout” and later
“Restore saved window layout”.
You may use monitors with different models or resolutions in your daily routine, and
apply different window layouts on them. DDM is able to know the monitor you have
reconnected and restore application positions accordingly.
In case you need to replace a monitor in a monitor matrix configuration, you can
save the window layout before replacement and restore the layout after a new
monitor is installed.
NOTE: You should keep your applications running in order to benefit
from this feature. DDM doesn't launch applications.
16 │ Attach DDM to active window (only Windows 10)
Attach DDM to active window
(only Windows 10)
For Windows 10, you can add the DDM shortcut icon to the toolbar region of active
windows. To activate this feature, right-click on the DDM icon in the notification
tray and choose Attach to active window from the opened menu.
Once you right-click the icon in the toolbar, a quick menu of DDM appears,
displaying options under Auto Mode and Easy Arrange for you to easily make
adjustments.
Other Shortcut Keys │ 17
Applying Energy Conservation Features
The Options tab provides PowerNap energy conservation options and allows you
to customize keyboard shortcuts.
In the upper pane, you can choose to set the monitor's brightness to the minimum
level, or to put the monitor to sleep when the screensaver is activated.
Other Shortcut Keys
You can define the shortcut keys for quick access to the following DDM functions:
•Program shortcut key: to quickly open the Quick Settings dialog box.
•Easy Arrange MRU shortcut key: to quickly apply the 5 recently used
window layouts.
•Application window shortcut key: to launch a quick menu for options under
Auto Mode and Easy Arrange.
18 │ Other Shortcut Keys
Troubleshooting
If DDM cannot work with your monitor, DDM will show below icon in your
notification tray.
Click on the icon, DDM shows a more detailed error message.
Please note that DDM only works with Dell branded monitors. If you are using
monitors from other manufacturers, DDM doesn't support them.
If DDM is unable to detect and/or communicate with a supported Dell monitor,
please take below actions to troubleshoot:
1. Make sure the video cable is properly connected to your monitor and your PC,
especially the connectors should be firmly inserted into position.
2. Check the monitor OSD to ensure DDC/CI is enabled.
3. Make sure you have the correct and latest display driver from the graphics
vendor (Intel, AMD, NVIDIA, etc.). Display driver is often the cause of DDM
failure.
4. Remove any docking stations or cable extenders or converters between the
monitor and the graphics port. Some low-cost extenders, hubs or converters
may not support DDC/CI properly and can fail DDM. Update the driver of such
device if the latest version is available.
5. Restart your system.
Other Shortcut Keys │ 19
DDM may not work with below monitors:
• Dell monitor models earlier than year 2013 and D-series of Dell monitors. You
can refer to Dell Product Support websites for more information
• Gaming monitors using NVIDIA-based G-sync technology
• Virtual and wireless displays do not support DDC/CI
• Some early models of DP 1.2 monitors, it may be necessary to disable MST/
DP 1.2 using the monitor OSD
If your PC is connected to the Internet, you will be prompted with a message when
a newer version of DDM application is available. It is recommended to download and
install the latest DDM application.
You may also check for new version by right clicking on DDM icon while pressing
and holding 'shift' key.