To add files to a Release, click the grey ‘+ Add Files’ button.
This will bring up the Choose Files from Content Library popup window.
Click on file names to see a preview of that file on the right hand side.
To add one or more files to a release, click in the checkbox to the left of the file name and then click on the orange Add Selected Files to Release button in the bottom right hand corner.
If you want to cancel the option to choose files, , click either the red Cancel button in the bottom left hand corner of the window or the small black ‘X’ in the top right.
Once back at the ‘Files’ tab in the edit release screen, you can again preview the files you’ve added to your release by clicking on the name of the file.
To remove a file from your release, click in the checkbox to the left of the file name and then click on the grey Remove Selected Files button.
Click Save your Draft and Continue Editing and then click the Distribution: Full tab to proceed.