How to reproduce: test the attached project with the latest version on a Windows 7 machine, notice that the font sizes are scaled, test the project with assemblies before  R2 2017 the fonts are not scaled

The issue is observed even with the RadControl.EnableDpiScaling property set to false. It would be expected that if the property was set to false, that the fonts would not be increased.

Workaround: change the fonts for each of the controls individually, the scaling can be calculated this way:
  Protected Overrides Sub OnShown(e As EventArgs)
        MyBase.OnShown(e)

        Dim dpi = NativeMethods.GetSystemDpi()
        Dim scale = dpi.X / 96.0
    End Sub

To reproduce: please refer to the attached sample project and gif file.

Workaround: use screentips: https://docs.telerik.com/devtools/winforms/telerik-presentation-framework/tooltips-and-screentips/screen-tips

How to reproduce: check the attached video
Workaround: select a color from a different tab or use the color picker

How to reproduce: enabled High DPI scaling and create a form as an MDI child with a RadDataEntry control in it
Workaround:  handle the Shown event of the MDI child and manually perform the scaling
private void radButtonElement1_Click(object sender, EventArgs e)
        {
            var view = new RadForm1
            {
                MdiParent = this
            };
            
            view.Shown += View_Shown;
            view.Show();
        }

        private void ScaleRadControls(Control c)
        {
            foreach (var item in c.Controls)
            {
                Control control = item as Control;
                if (control == null)
                {
                    continue;
                }

                this.mi.Invoke(control, new object[] { this.FormElement.DpiScaleFactor, BoundsSpecified.All });
                ScaleRadControls(control);
            }
        }

        MethodInfo mi;
        private void View_Shown(object sender, EventArgs e)
        {
            this.mi = typeof(Control).GetMethod("ScaleControl", BindingFlags.Instance | BindingFlags.NonPublic, null, new Type[] { typeof(SizeF), typeof(BoundsSpecified) }, null);
            RadForm1 v = sender as RadForm1;
            if (v != null)
            {
                ScaleRadControls(v.radDataEntry1.PanelContainer);
            }
        }

To reproduce:
- Open the Element Hierarchy Editor and resize it.

http://demos.telerik.com/aspnet-ajax/treelist/examples/overview/defaultcs.aspx

To reproduce:

1. Add a RadContextMenu to the form.
2. Change at design time its Animation Enabled property to false.
3. Save the changes and reopen the form.
4. AnimationEnabled property value is set back to true.

- Add RadRibbonForm
- Set the radRibbonBar1 RightToLeft property to YES at design time
- Close the designer and open it again -> another ribbon is showing up

Workaround: done set the ribbon's RightToLeft property, just set the RightToLeft property of the form itself.

One should be able to export to a stream instead to a file as well.

To reproduce: 
1. Drag and drop RadPageView on the form
2. Add 2-3 pages 
3. Set the ViewType to Backstage
4. Open smart tag and press Delete key to edit the Item Area Width property. 
After pressing the key, the RadPageView is removed from form.  

The issue is observed in Visual Studio 2015 only. 

To reproduce:
- Add RadLayoutControl to a form.
- Change the Language property at design time.
- You will receive the following message: There is already a command handler for the menu command '1496a755-94de-11d0-8c3f-00c04fc2aae2 : 103'. 

Workaround:
- Reopen the designer.

To Reproduce: 
1. Install Q2 2015 (version 2015.2.623) of Telerik UI Winforms on PC with Visual Studio 2008 
2. Start the VS2008 and create new VB Winforms project 
3. Drag and drop from toolbox any control (RadButton or RadGridView). 
4. Open smart tag and click Edit UI Elements 
5. Message box with error is shown 

Workaround: 
If is possible use Visual Studio 2010 or higher version.

To reproduce:
- Drag RadDropDownList control on a form, expand its DropDownListElement property, and change the ItemHeight
- Another case is, on a RadForm, expand FormElement>TitleBarElement and set its Visibility to Collapsed

Workaround: set the desired property at runtime
radDropDownList1.DropDownListElement.ItemHeight = 22;

Workaround: manually resize the editor or drag it upwards 

Steps to reproduce:
1. Drag a grid on the form
2. Drag one or more controls over the grid - at this point in the Document Outline you can see the dragged control is a child of the grid
3. Open the Property Builder of the grid and close it - at this point the dragged control disappears

Workaround:
1. Open the Designer.cs file, and locate the line, where the control is added to the grid e.g.
            this.radGridView2.Controls.Add(this.radButton4);
and change it to:
            this.Controls.Add(this.radButton4);

If need be, set the Location property of the control at design time, to position it at the desired place.

2. Alternatively, you can place the control outside the grid bounds and after selecting it, use the arrow keys to position is over the grid. This will not make it its child, hence the issue will not appear.

As workaround please, rename the controls with Find & Replace from VS Editor.