Yamaha RX21 - Manual (Page 21)

The length of the Dot Display depends on two things: the length of the pattern,
and the quantize rate. For example, in a 3/4 time pattern with a quantize rate of
1/12, the empty pattern will be displayed thus:
However, the LCD display only accommodates 16 beats, so in the case of a pattern
with more beats (for example, a 4/4 time bar with a quantize rate of 1/24) only
the first 16 beats will be displayed, initially. Then, as soon as the cursor passes the
last beat to the right of the LCD, the Dot Display will switch to show the remaining
beats in the bar.
Just remember that the pairs of vertical dots indicate the primary beats in each bar,
and you’ll find that the Dot Display is a valuable aid for programming your RX21
rapidly and accurately in the step write mode. You can exit the step write mode
from the Dot Display in the usual manner, by pressing the STOP/CONTINUE key.
Dot Display (Example: Time 3/4, Quantize 1/16, on pattern 00)
19