In most cases, we, as pilots, will need to enter the same value for several types of flight time, and these will be the same for a certain phase of our flying. For example, a student will most likely be entering the same values for Total Time and Dual Received on every flight, at least until they start flying solo. On the other hand, most airline pilots will be entering either PIC/P1 or SIC/P2 on every flight, so why should they have to type it in every time they enter a flight? They don't if they're using LogTen, of course.
On Mac, go to the LogTen menu in the top left of your Mac > Settings and select the Time tab. This tab displays all of the available time fields, and an auto-fill from total time checkbox for each. Tick the box under the fields you would like to be automatically updated when the total time changes (you can always override the value if you want it to be different from the total time).
In addition, it is also possible to quickly add time based on Total Time, which has not been previously auto-filled. To do this, all that is needed is to select the flight (or the flights), head to the right-side pane, click on the time that needs to be updated, and tap the space bar. Voilà!
You'll see in the gif below that, once the flights are selected, all that is needed is to select the time field, press the space bar, and the time will show automatically. This even works with Checkboxes!:
