DanO,
Pattern chaining is quite simple. Example: You record a basic pattern, you then use the pattern copy function and you can copy that pattern as many times as the keyboard will allow. With arrangers these are called variations and you are given 4 dedicated buttons on the face of the keyboard. With a synth you copy this pattern and a number is assigned to the pattern. Most allow up to 50 variations of one pattern. You then go into the song sequencer and just pick where you want each variation to go. It's so easy creating intros, breaks, fills and so forth this way... You can choose which measure each variation(pattern) will go. Making an intro is so easy. If you want a 4 measure intro, you just dial up the pattern number you want at measure 5.. That's why I asked if you have the Motif in your store. The pattern sequencer in that should function very closely to that of the Yamaha EX-5/7...

Squeak