I doesn't happen - it just happened once and I can't change it anymore
Here is the photo of how it looks like:
https://lh4.googleusercontent.com/-GnAjo...AG0290.jpg
And the following is in the debug log when I press ESC button in the web interface:
20:24:39 T:106504192 NOTICE: Enabled debug logging due to GUI setting. Level 2.
20:24:39 T:106504192 DEBUG: ------ Window Init () ------
20:24:39 T:126369792 DEBUG: NEWADDON PythonCallbackHandler construction with PyThreadState 0x1134e1c0
20:24:41 T:138694656 DEBUG: Previous line repeats 2 times.
20:24:41 T:138694656 DEBUG: webserver: request received for /jsonrpc?awx
20:24:41 T:138694656 DEBUG: JSONRPC: Incoming request: {"jsonrpc": "2.0", "method": "Input.ExecuteAction", "params": { "action": "togglefullscreen" }, "id": 1}
20:24:41 T:138694656 DEBUG: JSONRPC: Calling input.executeaction
20:24:41 T:106504192 DEBUG: About to switch to 720 x 480 on screen 0
20:24:41 T:106504192 INFO: GLES: Maximum texture width: 2048
20:24:41 T:106504192 DEBUG: CRenderManager::UpdateDisplayLatency - Latency set to 0 msec
20:24:41 T:126369792 DEBUG: NEWADDON PythonCallbackHandler construction with PyThreadState 0x1134e1c0
20:24:41 T:138694656 DEBUG: webserver: request received for /jsonrpc?awx
20:24:41 T:138694656 DEBUG: JSONRPC: Incoming request: {"jsonrpc": "2.0", "method": "Input.ExecuteAction", "params": { "action": "togglefullscreen" }, "id": 1}
20:24:41 T:138694656 DEBUG: JSONRPC: Calling input.executeaction
20:24:41 T:106504192 DEBUG: About to switch to 1280 x 720 on screen 0
20:24:41 T:106504192 INFO: GLES: Maximum texture width: 2048
20:24:41 T:106504192 DEBUG: CRenderManager::UpdateDisplayLatency - Latency set to 0 msec
20:24:41 T:126369792 DEBUG: NEWADDON PythonCallbackHandler construction with PyThreadState 0x1134e1c0
20:24:42 T:138694656 DEBUG: webserver: request received for /jsonrpc?awx
20:24:42 T:138694656 DEBUG: JSONRPC: Incoming request: {"jsonrpc": "2.0", "method": "Input.Select", "id": 1}
20:24:42 T:138694656 DEBUG: JSONRPC: Calling input.select
20:24:42 T:126369792 DEBUG: NEWADDON PythonCallbackHandler construction with PyThreadState 0x1134e1c0
20:24:44 T:138694656 DEBUG: Previous line repeats 3 times.
20:24:44 T:138694656 DEBUG: webserver: request received for /jsonrpc?awx
20:24:44 T:138694656 DEBUG: JSONRPC: Incoming request: {"jsonrpc": "2.0", "method": "Input.Up", "id": 1}
20:24:44 T:138694656 DEBUG: JSONRPC: Calling input.up
20:24:44 T:126369792 DEBUG: NEWADDON PythonCallbackHandler construction with PyThreadState 0x1134e1c0
20:24:45 T:138694656 DEBUG: Previous line repeats 1 times.
20:24:45 T:138694656 DEBUG: webserver: request received for /jsonrpc?awx
20:24:45 T:138694656 DEBUG: JSONRPC: Incoming request: {"jsonrpc": "2.0", "method": "Input.Right", "id": 1}
20:24:45 T:138694656 DEBUG: JSONRPC: Calling input.right
20:24:45 T:126369792 DEBUG: NEWADDON PythonCallbackHandler construction with PyThreadState 0x1134e1c0
20:24:45 T:138694656 DEBUG: webserver: request received for /jsonrpc?awx
20:24:45 T:138694656 DEBUG: JSONRPC: Incoming request: {"jsonrpc": "2.0", "method": "Input.Up", "id": 1}
20:24:45 T:138694656 DEBUG: JSONRPC: Calling input.up
20:24:46 T:126369792 DEBUG: NEWADDON PythonCallbackHandler construction with PyThreadState 0x1134e1c0
20:24:46 T:138694656 DEBUG: webserver: request received for /jsonrpc?awx
20:24:46 T:138694656 DEBUG: JSONRPC: Incoming request: {"jsonrpc": "2.0", "method": "Input.Left", "id": 1}
20:24:46 T:138694656 DEBUG: JSONRPC: Calling input.left
20:24:46 T:138694656 DEBUG: webserver: request received for /jsonrpc?awx
20:24:46 T:138694656 DEBUG: JSONRPC: Incoming request: {"jsonrpc": "2.0", "method": "Input.Up", "id": 1}
20:24:46 T:138694656 DEBUG: JSONRPC: Calling input.up
20:24:46 T:126369792 DEBUG: NEWADDON PythonCallbackHandler construction with PyThreadState 0x1134e1c0
20:24:46 T:138694656 DEBUG: webserver: request received for /jsonrpc?awx
20:24:46 T:138694656 DEBUG: JSONRPC: Incoming request: {"jsonrpc": "2.0", "method": "Input.Right", "id": 1}
20:24:46 T:138694656 DEBUG: JSONRPC: Calling input.right
20:24:47 T:126369792 DEBUG: NEWADDON PythonCallbackHandler construction with PyThreadState 0x1134e1c0
20:24:47 T:138694656 DEBUG: webserver: request received for /jsonrpc?awx
20:24:47 T:138694656 DEBUG: JSONRPC: Incoming request: {"jsonrpc": "2.0", "method": "Input.Select", "id": 1}
20:24:47 T:138694656 DEBUG: JSONRPC: Calling input.select
20:24:47 T:106504192 NOTICE: Disabled debug logging due to GUI setting. Level 0.
20:24:47 T:106504192 NOTICE: Log level changed to 0