DAGs can be created at any time, but it is best to do it before data collection begins. Using Send-It, you can upload and send files, including existing project documents, that are too large for email attachments or that contain sensitive data to multiple recipients. In this section, we will use a sample registry with fictitious data to highlight some of the benefits of using REDCap for your registry. However, below are some tips that may be useful to you. To hide a section header, all fields until the next section header must also be hidden. The record_id field should always be the first field of your first instrument in the project, because the record_id field is what REDCap uses to link together all the data in a particular record. REDCap supports embedded audio and video, with several different options for video under the Descriptive field type, as well as full support for the HTML