TAD's ACT vs LOFF

I'm pretty familiar with use of the TAD.

I'm wracking my brain (/search engine/google) to figure out the precise distinction between these two modifications to the TAD view.

If anyone has a line on this I would appreciate a word or two.

Many thanks,

Moosh

On the TAD page, OSB 2-5 are TAD profile "quick keys". Each loads the set of TAD elements defined for that profile on the TAD profile control page (OSB 1). There, you can edit existing profiles and create new ones.

- On the TAD profile control page, select the profile to edit (OSB 19/20)

*OR*

- Create a new profile - type name on UFC (up to 4 characters) , enter name (OSB 18), save (OSB 3)

- Open the profile settings page (OSB 17)

- Select element/symbology (OSB 19/20)

- Select functionality (OSB 18)

- Save profile (OSB 3)

You may save up to nine profiles. When there are nine profiles in memory, OSB 18 will display the message "DB FULL".

Suppose you have created a new profile and want to place it on one of the "quick keys":

- Press and hold any profile key (OSB 2-5) for ~2 seconds until TAD screen clears and "TAD DISPLAY PROGRAM" appears

- Select profile to move to quick key (OSB 6-9 and 16-20)

- Select quick key you want to move the profile to (OSB 2-5)

Looking at the default profiles, I assume "LOFF" means "waypoint lines off" and "ACT" means "active flight plan only"

Thanks....very helpful.