How to add automatic resizing to already designed UI ?

[RahibeMeryem]

I have already designed my UI for a bigger screen size which using 4K resolution.
But now I need lower resolution version of this UI.

How can I make automatically resize ALL without breaking the design integrity of the all widgets/buttons etc ?

Best

[jsulm]

@RahibeMeryem Use layouts: https://doc.qt.io/qt-5/layout.html

[RahibeMeryem]

I read but didn't understand how to solve my problem.

I have already UI designed. Trying to this gui resizable without changing the appearance.

[Pablo J. Rogina]

@RahibeMeryem maybe you need to take a look at working with layouts in Designer along with more about layouts

[JonB]

@RahibeMeryem
You must read the links @Pablo-J-Rogina has given you.

In your screenshot, where you see all those red "no entry" signs on your central widget and each of the tabs, that is Designer warning you that you need to set a layout on that widget.

And having correct layouts is a prerequisite for resizing.