Fill Mode Question

I can’t find the answer to this in the manual or in other related threads here:

Is the fill mode only activated with trig conditions? The manual seems to suggest it can be manually triggered, but I can’t make it happen. Also, how does one program the fill? There’s no mention of that in the manual either, I have tried latching with the key combo, and it appears to change to a different mode, as all four page lights light up (where, in my case their had previously been two). If I enter trigs whilst in this state, they remain when I exist fill mode, so I’m actually editng separate fill pages it seems.
There’s something I’m not getting here, any pointers would be much appreciated,

K

3 posts were merged into an existing topic: OT TRig Conditions (TRC) thread

that’s still where they have to go as you have been advised recently - please keep it tidy