y 

n/a 

n 

Recommended 

_ 

_ 

_ 

eh: 

Drag and drop should not be the only method for attaching objects. 

Recommended 

_ 

_ 

_ 

ei: 

Double-clicking is a shortcut for selecting the attachment and choosing the Open menu item for attachments and should never be the only way to access attachments. 

Recommended 

_ 

_ 

_ 

ej: 

When the user attempts to drop something into the attachment list that is not attachable, then the drop fails and the item is snapped back to its source. 

Recommended 

_ 

_ 

_ 

ek: 

When the user has one or more attachments open for editing and attempts to do any operation that would result in potentially losing the user's edits, the user should be clearly warned and given the opportunity to save changes. 

Recommended 

_ 

_ 

_ 

el: 

When the user chooses something to attach from the file selection dialog box that is not an attachable item, then the user receives an error message explaining why the chosen item cannot be attached. For example: 

The folder "My.Stuff" cannot be attached because 
it is a folder.  Only documents, applications, and scripts 
can be attached.