Click the top Bcc button. That will create a new Bcc line. Now enter the recipient email addresses into the new line. With TB78 there can now be multiple recipient email addresses per line.

Thanks Christ1

I have tried that, and it does work - sometimes. However it isn't as easy as when I used to be able to create several Bcc lines. With just line Bcc line even putting a comma between the names does always seem to work. But neither is it as easy to actually add names. Previously adding part of a name inserted the whole email address. What do you think I might be doing wrong. Revd David

What do you think I might be doing wrong.

I don't know. With TB78 is basically works the same way as in TB68, except that you don't need a separate line for each address. There is no need to put commas in between recipient addresses. Just start typing the recipients name, pick the desired address from the auto-complete list, and start typing the next recipient. It's as simple as that.