* Optional auto-save/restore of window layout and game/machine selection * Time-consuming background tasks can be stopped on demand at (nearly) any time * The GUI will always remain interactive even if heavy background processing is running * Optional additional category-oriented (MAME/MESS/UME) and version-oriented (MAME/UME) views when catver.ini and/or MESS category.ini support is enabled * All emulator targets: two different views of the game/machine list: full detail and parent/clone hierarchy * Online display of current game/machine list and search result statistics * Game/machine image checks (icons, previews & flyers) * Clear and full logging (separate front end and emulator logs) * Straightforward process management to control emulator processes * All emulator targets: selectable sort criteria and order for game/machine lists (description, name/ID, ROM state, year, manufacturer and ROM types)

* Fast search function with automatic wildcard pattern matching * Support for all emulation-related extra information available through the emulator (displayed in a tree) * Cool editor for configuration of global and game/machine-specific emulator options, including a search function * Easily extensible template-based emulator configuration scheme (defined through an external XML file) * Icons and all game/machine images can either be stored as individual files in respective directories or they can be combined and compressed in ZIP archives * Support for game/machine icons - historically only PNG images, but when stored in ZIPs, nowadays also ICO format is supported * Extremely fast drawing of game/machine images, optionally smoothly scaled (PNG images, buffered in a resizable LRU-cache)

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