HI,   I am new to Constant Contact, and I cannot figure out how to do something that should be very simple. I am trying to add a "join now" button to my email, and I would like the button centered in the column. When I click to edit the button clock, the "center" function seems to apply to the text in the button, not the button itself. Also, the button itself has square corners - it looks extremely dated. Is there a way to round the corners? Thank you. ... View more