Android Emulator: missing right panel
- Put mouse at top right conner(Cursor change to double head arrow)
- left click mouse and drag out to right. The panel will display again.
Minimise the emulator window then maximise it again. The right panel will re-appear.
After some hours digging, I ended up updating my Android sdk tools to the latest version (25.1.1 in my case). Then the problem solved.