Spectrum zoom lets you select from six different zoom settings for the Spectrum Display. You can also do this with pinch gestures on the Spectrum Display.

Auto note switching lets you turn auto note switching on or off and configure the kind of auto note switching desired (up, down, or both directions). You can also do this with gestures from the Current Note Display.

Over-pull manages the process of pre-measuring a piano and then setting modified tuning targets to compensate for the overall pitch change that is required.  Use only for major pitch changes.

Load a non-equal temperament lets you choose or cancel a non-equal (or "historical") temperament to be applied to the current tuning.

Make a non-equal temperament lets you create new non-equal temperaments by entering the 12 offsets that define the temperament.

Edit IH constants lets you review and delete any inharmonicity measurements that have been made for the current tuning.

Edit measure sequence lets you specify which notes you want to have measured when starting a new tuning.  These notes will be selected automatically for you as you make the measurements.

Edit table of partials lets you specify which partials are to be used for which notes in the current tuning file or when a new tuning file is started.

Auto partial selection configures the operation of automatically choosing which partial to use for tuning notes in the bass.

Persistent partials is a switch that determines whether the manual changes you make to the partial selection are to be stored in the current tuning file, or whether those changes should be considered just temporary.

Custom offsets lets you examine and modify the table of custom offsets for each note. These offsets are normally all zero. You can also set the custom offset for the current note using a gesture. See the help on the main tuning screen for details.

Do a calibration manages the process of calibrating the pitch reference in your device to compensate for hardware differences between devices.

PTG Tuning Exam manages the process of capturing a master tuning, detuning a piano in preparation for the exam, capturing the examinee's tuning, and creating a scoring report of the comparison between the examinee's and the master tuning.

About this version displays the version number, build date, and the actual calibrated sample rate for your device. You can also reinstall the pre-packaged sample tuning and temperament files from this page.

Use old-style IH is a switch that makes the software use the old inharmonicity model from 2010. Otherwise the software will use the new inharmonicity model that is provided starting with version 3 in 2012. Tap here for more information on the difference between the two models. Only the new inharmonicity model can provide split-scale tuning.

Phase display speed adjusts a multiplier that makes the phase display boxes move faster or slower. The default is 1.00. Higher settings of this multiplier make the phase display appear more sensitive, but also more jittery. Lower settings make the display appear smoother, but with less sensitivity.

Use thick spectrum is a switch that causes the Spectrum Display graph to be drawn with thicker lines that are easier to see. While easier to see, a bold graph has slightly less resolution. This option does not apply to the wide zoom level, which is always drawn with thin lines.