3 respuestas
Not without creating your own visualforce page.
Here are some links to ideas on this subject if you want to help vote them up.
https://success.salesforce.com/ideaView?id=08730000000koFmAAI
https://success.salesforce.com/ideaView?id=08730000000Brq3
Most folks, when it comes to mass upload, use the Data Import Wizard, Data Loader, or dataloader.io , though.