You may change the Stock group 1 and / or 2  for selected stock item(s). 

To change the Stock group 1: 

1.On the Edit → Stock items (Stock list screen) select the stock item(s), right-click on Stock group 1 or 2 context menu. 

2.Select empty or the available Stock group from the sub-menu. The Stock group 1 or 2 will change on the reports. 

The Copy from Supplier 1 will place the "Preferred supplier 1" on the clipboard and paste it into "Preferred supplier 1" field of a selected stock item. 

The following confirmation message will be displayed:

Replace old data for &Supplier 1?  

Example of the "Preferred supplier 1" detail in the selected stock item to copy from:

TurboCASH4 - Stock items - context menu - copy supplier

Example of the "Preferred supplier 1" detail in the selected stock item to which the copied account of "Preferred supplier 1 is pasted to:

TurboCASH4 - Stock items - context menu - copy supplier