The RTA provides 1 and 1/3 octave resolution, the high-accuracy provides a solid overview of the spectral distribution of your mix.
The individual band zoom lets you pinpoint exact frequencies, even outside your hearing range, allowing problematic frequencies to be identified and adjusted as necessary.

Press the 1st button to automatically set the scale top values of the level scale (dB) of the RTA view according to the current audio source. Alternatively, both scale range and scale top values can be set automatically.

Setting the scale automatically will give you the best visual feedback and ensure that certain frequencies aren't rising beyond view.

Note: This is only effective while audio is being played.

The 2nd button provides a global measurement reset, and will reset all measured values across Clarity M.

The rotary knob can select a specific frequency for detailed information.