The Control Panel is accessed LTspice via the Control Panel hammer Icon or the drop down menu items: Tools => Control Panel and sometimes Simulate => Control Panel. This access is generally available in all LTspice window types (Schematic, Netlist Editor, Waveform Viewer, FFT Waveform Viewer).
The Control Panel is organized like tabbed index cards:
|Compression||Save Defaults||SPICE||Drafting Options|
|Various options for active Tab|