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How to Adjust ALT+TAB Desktop Background Dimming Percent in Windows 10

information   Information
When you press ALT+TAB or CTRL+ALT+TAB to switch between open windows in Windows 10, the desktop background will not be dimmed by default.

This tutorial will show you how to adjust the ALT+TAB desktop background dimming percentage you want for your account in Windows 10.


CONTENTS:
  • Option One: To Adjust ALT+TAB Desktop Background Dimming using a REG file
  • Option Two: To Adjust ALT+TAB Desktop Background Dimming in Registry Editor


EXAMPLE: ALT+TAB desktop background dimming percentage levels
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Name:	Semi_dimming_Alt+Tab.jpg 
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Adjust ALT+TAB Desktop Background Dimming Percent in Windows 10 OPTION ONE Adjust ALT+TAB Desktop Background Dimming Percent in Windows 10
To Adjust ALT+TAB Desktop Background Dimming using a REG file

Note   Note
The .reg files below will add and modify the DWORD value in the registry key below.

HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\MultitaskingView\AltTabViewHost

BackgroundDimmingLayer_percent DWORD

(delete) = Default (fully transparent)
50 (decimal) = Semi dimming (semi transparent)
100 (decimal) = Full dimming (full opaque)


1. Do step 2 (default), step 3 (semi dimming), or step 4 (full dimming) below for what you would like to do.


 2. To Use Default ALT+TAB Desktop Background Dimming

NOTE: This is the default setting.

A) Click/tap on the Download button below to download the file below, and go to step 5 below.

Default_Alt+Tab_desktop_background_dimming.reg

download


 3. To Use Fully Transparent ALT+TAB Desktop Background Dimming

A) Click/tap on the Download button below to download the file below, and go to step 5 below.

Semi_transparent_Alt+Tab_desktop_background_dimming.reg

download


 4. To Use Semi Transparent ALT+TAB Desktop Background Dimming

A) Click/tap on the Download button below to download the file below, and go to step 5 below.

Full_opaque_Alt+Tab_desktop_background_dimming.reg

download


5. Save the .reg file to your desktop.

6. Double click/tap on the downloaded .reg file to merge it.

7. If prompted, click/tap on Run, Yes (UAC), Yes, and OK to approve the merge.

8. You can now delete the downloaded .reg file if you like.

9. You may also wish to adjust the ALT+TAB grid background transparency.






Adjust ALT+TAB Desktop Background Dimming Percent in Windows 10 OPTION TWO Adjust ALT+TAB Desktop Background Dimming Percent in Windows 10
To Adjust ALT+TAB Desktop Background Dimming in Registry Editor


1. Press the Win+R keys to open Run, type regedit, and press Enter.

2. If prompted by UAC, click/tap on Yes.

3. In Registry Editor, browse to the key at the location below. (see screenshot below)

HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\MultitaskingView\AltTabViewHost

Note   Note
If you do not have a MultitaskingView key (not there by default), then right click on the Explorer key, click/tap on New, click/tap on Key, type MultitaskingView, and press Enter.

If you do not have a AltTabViewHost key (not there by default), then right click on the MultitaskingView key, click/tap on New, click/tap on Key, type AltTabViewHost, and press Enter.


Name:  ALT+TAB_desktop_background_dimming_regedit-1.png
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4. In the right pane of the AltTabViewHost key, double click/tap on the BackgroundDimmingLayer_percent DWORD value to modify it. (see screenshot above)
Note   Note
If you do not have a BackgroundDimmingLayer_percent DWORD (not there by default), then right click or press and hold on an empty area in the right pane of the AltTabViewHost key, click/tap on New, click/tap on DWORD (32-bit) Value, type BackgroundDimmingLayer_percent, and press Enter.


To restore the default ALT+TAB desktop background dimming percentage level, you would just need to delete the BackgroundDimmingLayer_percent DWORD.



5. Select (dot) Decimal, enter a number between 0 to 100 for the dimming percentage level you want, and click/tap on OK. (see screenshot below)
Note   Note
0 = No dimming

100 = Full dimming


Name:  ALT+TAB_desktop_background_dimming_regedit-2.png
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6. Press ALT+TAB or CTRL+ALT+TAB to see how you like this percentage level, and adjust until you have the percentage you want.

7. When finished, you can close Registry Editor if you like.

8. You may also wish to adjust the ALT+TAB grid background transparency.



That's it,
Shawn