The planetarium settings tab contains the options related to the integration with the planetarium application you use. This integration can be used in PointCraft, Object Browser and Gear Tab.
For more information about the integration with planetarium applications see the Planetarium in APT Features section.
Connect to and communicate with Cartes du Ciel - CdC (https://www.ap-i.net/skychart/en/start). If CdC is installed on the local machine enter for IP address 127.0.0.1 and leave the Port to 0. If CdC is on a remote machine set the IP and Port used there.
Before making a connection, go to CdC -> Setup -> All Configuration Options -> General -> Server, enable the options "Use TCP/IP server" and "Keep client connection active". Enable the option CdC -> Setup -> All Configuration Options -> Display -> Finder Rectangle -> Mark the center of the chart.
Also CdC has to be set in Equatorial chart mode from Chart->Chart Coordinates System.
Connect to and communicate with Computer Aided Astronomy - C2A (http://www.astrosurf.com/c2a/english/). If C2A is installed on the local machine enter for IP address 127.0.0.1. The default Port is 5876. If C2A is on a remote machine set the IP and Port used there.
Connect to and communicate with SkytechX (http://skytechx.eu/). If SkytechX is installed on the local machine enter for IP address 127.0.0.1. The default Port is 2055. If SkytechX is on a remote machine set the IP and Port used there.
Before making a connection, go to SkytechX -> File -> Setting -> Server tab, enable the option "Run server on startup" and click on "Start Server".
Connect to and communicate with Hallo Northern SKY - HNSKY (http://www.hnsky.org/software.htm). If HNSKY is installed on the local machine enter for IP address 127.0.0.1. The default Port is 7700. If HNSKY is on a remote machine set the IP and Port used there.
Before making a connection, go to HNSKY -> File -> Setting -> TCP/IP Server tab and enable the option "Use TCP/IP server".
Connect to and communicate with Stellarium 0.17 or newer (http://stellarium.org/). If Stellarium is installed on the local machine enter for IP address 127.0.0.1. The default Port is 8090. If Stellarium is on a remote machine set the IP and Port used there.
Before making a connection there is need to make some configurations in Stellarium:
In Configurations -> Plugins make sure that "Remote Control" plug-in is configured as "Load at startup" (restart Stellarium after enabling). After that click on "configure" and enable the options "Server enabled" and "Enable automatically on startup"
In Configurations -> Plugins make sure that "Oculars" plug-in is configured as "Load at startup" (restart Stellarium after enabling).
In "Oculars" configuration go to "Sensors" tab and define a new sensor or edit one of the existing. All the needed data can be found in the Object Calculator (for CCD/CMOS a connection is needed in order to determine the pixels count). Enter the number of the sensor in the APT settings. The first sensor is 0, the second 1 and so on (the index is zero based).
In "Oculars" configuration go to "Telescope" tab and define a new sensor or edit one of the existing. Enter the number of the telescope in the APT settings. The first scope is 0, the second 1 and so on (the index is zero based).
The APT Settings dialog box is accessible from 
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