Many applications on Windows can be scaled with the Windows scaling settings. If the VA Smalltalk application does not behave well under the preferred scaling factor (e.g. 125%) and the other applications need to stay at that scaling factor, a way needs to be found to make that compromise. VAST needs to ignore the scaling settings.

The manifest file shipped with the VAST Platform (VA Smalltalk) makes a VAST application aware of HiDPI setting in Windows. To make your application unaware of HiDPI, remove the HiDPI part of the manifest ( the <compatibility> and <application> sections). If your application is named abt.exe the manifest is. abt.exe.manifest.

Once you have done this, you may need to recache the manifest in Windows. See FAQ04015.