You can just drag and drop... I do it all the time...

You can alos use the Control key to select files you wish to add from the select file window from the add attachment button and attachment tab.

When adding attachments it would be nice to allow adding multiple attachments at once.

Such as in adding multiple pictures by Ctrl-Click selecting multiple pictures to be added to the attachments.

Rather than having to do attachment adds one by one.

Clarification: In the Pegasus "Recently-used files" dialog.

Selecting multiple files has been possible via the Explorer dialog ("Add attachment" button) for a long time.

Tools - Options - Advanced Settings - Allow multiple file selection when adding attachments

HTH

Martin