Hello Mi,

Upon checking this item due to inactivity for a long period, I think I understand what you mean in the first place. I was able to observe the described behavior. In aero mode, the header part with the preview page title is not fully visible as its back color becomes transparent. When moved to a darker area the text is visible. 

I have updated your Telerik Points for bringing this to our attention.

Regards,
Dinko | Tech Support Engineer
Progress Telerik

Hello, Mi, 

According to the provided information, it seems that you are designing your application on a monitor with higher than 100% DPI scaling. Could you please confirm that?

If your development machine has HDPI monitor and the scaling settings are larger than 100%, this can cause issues with the layout because opening the designer on such machines will set the AutoScaleDimensions property (the default value in Designer.cs is SizeF(6F, 13F)). In the AutoScaleDimensions property the Visual Studio designer will serialize the dimensions of the unit used for comparison (either Font or DPI). These are the dimensions of the unit on the system the form is being designed on. When you run the form on a system with different settings, its dimensions are obtained and compared against the serialized dimensions. The scaling factor is computed based on that and then it is applied. And if a wrong factor is passed, the application can look smaller or larger than it should be. Please make sure that this property has its default value (SizeF(6F, 13F)).

Design your forms under 96 DPI (100%) – as mentioned above, Visual Studio will serialize the scaling size of the form at design time and there are often problems when the form has been designed under higher DPI. Thus, RadWizard is expected to produce better layout.

In order to produce as good layout as possible when running your application on monitors with different DPI scaling, it is important to have some thoughts in mind before you start designing the application:
https://docs.telerik.com/devtools/winforms/knowledge-base/hdpi-tips-and-tricks#general-tips-for-designing-scalable-winforms

I hope this information helps. If you need any further assistance please don't hesitate to contact me. 

Regards,
Dess | Tech Support Engineer, Sr.
Progress Telerik