When creating a bulk email in V5.0.6 there is hardly any room to type into , the Tags sections takes up all of the space and you really have to scroll around to see what you have typed and cannot view the entire body of text that you typed. See below screen shot.

Thank you for bringing this issue to our attention! I can confirm this should be further reviewed and I have logged an internal bug report for our development team to investigate and address as necessary, in a future maintenance release.