Choosing sender ID while sending from file

while using feature send from file, how can i choose the sender ID from list of sender IDs defined for that user? by default it takes first one from the list…

someone can help on this?

any suggestions,someone can help?

You have to set the defaut sender Id to the one you want to use

One user can have number of sender IDs so i want to choose while uploading a file (send from file) option, any alternative?