VSVenkatesh Sundaram Syncfusion Team August 7, 2015 01:13 PM UTC
Sorry for the inconvenience.
As per our current architecture, there is no default way to drag and drop two columns to other columns. However we can achieve this by customizing the events like MouseUp and MouseDown and add required conditions to move the columns in the grid. If you need any further assistance regarding this, then we suggest you to create an incident in our Direct Trac. so that our development team will look into this and will give you solution.
Please let us know if you need any further assistance.