In Logbook Pro for Desktop
Go to VIEW..OPTIONS..CUSTOM
Click on the CUSTOM TIME tab
Add Part 1 PIC as a custom time
Close the Window
Perform a Cloud sync (PDA... CLOUD SYNC... SYNC NOW)
On the Logbook Pro Mobile App
Go to Settings...Flight Log and scroll to the bottom of the list (under layout)
Click on CONFIGURE DISPLAY
Turn on CUSTOM TIME (GREEN)
Back out to the main screen
Select SYNC
Try and create a new flight and the custom time column should now be shown.