FL Studio 10: another 'eureka' moment for me

Suggested way to build a track in the sequencer (learned after much faffing about)

1. Clone 'pattern 1' as many times as needed
2. For each pattern, load the samples you want to include as channels
3. Use the piano roll to set the sequence for each channel in each pattern

NB:

1. If the green light to the left of a channel is turned OFF, future or prior patterns will lose the opportunity to include that channel; so keep the green lights turned ON for all channels on all patterns
2. For a particular pattern where you want to exclude a particular channel, go to the piano roll and remove the channel's sequence: this keeps the channel available for other patterns

So, 

• The piano roll is 'king'
• To make a channel 'live' for a pattern, program the sequence in the piano roll
• To effectively remove a channel from a pattern (or turn it off), go to piano roll and remove the sequence