Android Question B4A Visual Designer Problem

I am new to B4A. When I start to use Visual Designer, I find my button is out of the boundary in Abstract Designer, however under the emulator , it is within the screen . I could I se t my the Abstract Designer just as the emulator screen. Both of them use the same scale : 320 X480, scale=1. Attached is the image for your kind reference.

Thanks for all your help and advise

Mak