Secret Settings in Telegram Desktop
Open Telegram Settings and then type in one of the following commands:
videoplayer: switches between internal and external video player
debugmode: enables/disables debug logs. All network events will be logged if this mode is active..
viewlogs: opens the folder where debug logs were saved.
registertg: registers tg:// URI scheme
export: exports your data
freetype: changes font engine on Windows and macOS
Sounds
msg_incoming: changes the sound when a new message arrives
call_incoming: changes the sound of incoming call
call_connect: changes the sound of connection call
call_outgoing: change sthe sound of outgoing call
call_busy: changes the sound of busy call
call_end: changes the sound of end call
sounds_reset: resets all custom sounds