MC by Solar Arc for secondary progressions
This is similar to the setting in astro,com (which is used with sec prog. in RA):
Please note that selecting Naibod by Longitude, or Mean Quotidian disables the switch button. Progressing the MC by Solar Arc in long applies only to Naibod by RA.
Example Chart with MC progress by Solar Arc
Note the text at the top of the chart /MC SA which = MC progressed by Solar Arc
Example Speculum Listing – Aspects tab button tapped.
Showing MC SA in the title heading