This control element is used to work with harmonic charts. It is activated only when the "Harmonic" coordinate system is selected.
The element works as follows:
The table area contains a set of HT (harmonic charts) that the user has selected in the corresponding settings section.
HT are displayed in order from the chart with the maximum number of aspects to the HT with the minimum number of aspects, depending on the selected set of HT.
The current HT is highlighted.
The HT lines have the following format:
HT number
Number of aspects
Aspects distributed by types
The line with the HT parameters is clickable. By clicking on it, the corresponding map is displayed on the screen.