Can you add some options when you create the emulator?
The existing "AVD Manager" cannot generate a border-free emulator, while the "AVD Manager" that comes with AS can be customized freely.
Because "B4A AVD Manager" by default generates an emulator with a physical keyboard that takes up too much screen space.
Most phones these days don't carry extra physical keyboards, do they?
Discover that you can implement a rimless emulator by modifying the following items.
Find "config.ini" in ".\ Anddroid \ B4AEmulator \ [Simulator Path]"
Edit:
skin.path=_no_skin
skin.name=600x1280 ' refer to the value below
hw.lcd.width=600 ' screen width
hw.lcd.height=1280 ' screen height