Hello,

I have tried to split my UHD 3840x2160 monitor into 2x 1920x2160. If i try to maximize MS Outlook, it extends to the full screen and not only to 1920x2160.

If i split into 1890x2160, all works fine, but at area widths above 1900, maximize Fails.

My settings are:
3 monitors:
- 1920x1080 on the left (splitted into 800x500 + 800x580, 800x1080 and 320x1080),
- 1920x1200 in Center (primary monitor, not splitted),
- 3840x2160 on the right (splitted with problems above area width of 1900)

The settings at the attached picture works fine because i added a 300px width area and so the both remaining are smaller than 1900px, but that is not a good solution for all purpose.

What can I do to get rid of this issue?

Thanks

Anton

Thanks for your response!

I forgot my system details:

graphics: AMD Radeon R9 290
cpu: Intel i7-4790K

displays:
Samsung S24A300B 1920x1080 @HDMI (DVI->HDIM adaptor)
DELL U2412M 1920x1200 @DVI
Samsung U28D590D 3840x2160 @DisplayPort

Windows 7 Home SP1

Maybe this helps for testing.
I'm curious about it.

Your attachment is protected and I can't access it (I'm logged in, that's not the problem).
I've testet it with notepad at an area of 2160x2160px and it also expands to full screen.

If I make the 3840x2160 UHD display the primary, applications only maximize to the desíred size of the area.
My problem occours only if the UHD display is NOT THE PRIMARY display.

I found out the exact parameters:

Maximization fails if the area meet following conditions at once:

width >= 1921
height >= 1201
display is not the primary display

If the display is the primary display or the width is below or equal 1920 or the height is below or equal 1200, than all works correctly.

MS Office products need a width below 1900px. At 1920x2160, they still expand to full screen.

Maybe this is a hint for finding the root of the problem.

Thanks for investigating!

It's not only with MS Office apps. It's also with notepad. Have you tried it on a non primary screen? On the primary one there is no problem. Maybe I can try it with other constellations tomorrow (only two screens etc.)

PS: Your screenshot appears still protected.

Now the screenshot is unprotected. Taskbars are deactivated as you can see in my first screenshot.
It seems your settings are the same as mine.
I’ve tried two displays, other relative screen positions and so on. All tests lead to the same result: The apps maximize to the size of full screen size (above 1920x1200px area size). The app’s upper left corner is at the right position (identically with the upper left corner of the area), but the size is always 3840x2160px. If the areas upper left corner is at {100;100}, the app maximizes to {100;100}x{3940;2260} (it projects beyond the edges of the screen). As an example I attached a new screenshot with maximized solitaire at {1915;500} (1925x1660px). It seems the window never gets the width and height of the destination area. I’ve recorded the window messages with spy++ and included the results into the screenshot.
Now I’ve deactivated all possible options (with the same test results) and attached my system details (DisplayFusion troubleshooting tab).

No, if only the UHD monitor is enabled all is fine (than the UHD is the pimary one and if so, it always works as expected).

Now it works fine, thank you!