Hello Mo,
Just for your information, in the UML specification, frames are optional, not mandatory (quoted from the specification 'As an option, it may have a frame and a heading as shown in Figure A.1.' in Annex A: Diagrams)
In the SysML specification, frames are mandatory. The SysML spec says 'The frame is a rectangle that is required for SysML diagrams (Note: the frame is optional in UML). '
So, some UML tools may have frames in UML, but EA is 100% legal in this point.
HTH,