Currently if your custom message on the subscription or remote authentication popup is too long, it will cause the popup to display a scroll bar in order to accommodate the long message.

A way to eliminate the scroll bar or display your message more cleanly is to enclose your custom message in an html <div> tag.

Make sure you define the size of the area (EG <div style="height:100px">CUSTOM MESSAGE HERE</div>)

You can adjust the height of the div to best display your message.

See below before and after screenshots of the popup.  In this case I added <div style="height:200px"> because my message was a bit longer. 

BEFORE (FORGOT USERNAME/PASSWORD LINK HIDDEN BY SCROLL)

AFTER(FULL LOGIN SCREEN SHOWN)

-The Mygazines Team