Pressing F1 on the property page navigates to:

https://msdn.microsoft.com/query/dev16.query?appId=Dev16IDEF1&l=EN-US&k=k(cs.ProjectPropertiesBuild)&rd=true

This redirects to:

https://msdn.microsoft.com/Areas/Epx/Content/500.aspx?aspxerrorpath=/query/dev16.query