dBFS means "decibels relative to full scale". It is an abbreviation for decibel amplitude levels in digital systemswhich have a maximum available peak level. 0 dBFS is assigned to the maximum possible level. A signal that reaches 50 % of the maximum level would peak at -6 dBFS, for instance. All peak measurements will be negative numbers.
The recommended volume for audio mixing typically ranges between -18 dBFS to -12 dBFS for peaks, leaving headroom to avoid clipping. Aim for an average level around -6 dBFS to -3 dBFS for the overall mix. This allows for clarity and dynamic range while maintaining a balanced sound. Always monitor on different systems to ensure consistency across playback devices.
There are several uses for the Table of Contents (TOC). It is the visual representation of the features you have loaded in your project (mxd). You can turn views off for shapefiles or shapefiles and .dbfs (tables) and their paths by the bottom tabs. The stacking of shapefiles in the TOC affects how they are visually stacked in the layout or data view (if A is above B in the TOC, the map will display A above B). The TOC also grants you access (via Right Clicking a feature) to a Menu for several important functions such as saving, properties, saving as layer, opening the attribute table for the feature etc. Features in the TOC can be grouped together to allow en masse manipulation of the features (turning on\off). Features can be 'renamed' in the TOC to provide better naming, especially when creating a legend. The TOC shows (via the + next to the feature) what its type is; polygon, point or line. Double-clicking these will open a window where you can change the features symbol, color, font, size etc.