Utilizing Scales
ZenEdit contains sophisticated tools to aid you in laying out scale intervals across the triggers of your Zendrum.
Overview
When you are making general edits to triggers, you typically are assigning MIDI note numbers to them. The difference when using the scales feature is that you are instead assigning 'interval numbers' to triggers. This distinction is key to understanding how the scale feature in ZenEdit works, and to use it to its fullest ability. An interval is a specific position in a scale, independent of the MIDI note value. This allows you to alter scales after the fact and not have to worry about remapping note numbers.
To begin, switch to "Scale Edit Mode" by clicking on the treble clef button in the main view port:
If you have not already done so, create a new scale by clicking on the "Add Scale" button.
For each scale you can select:
As you change the settings for the scale, the individual note numbers for each interval will update.
Selecting an Octave
Scales have from 5 to 12 intervals per octave, with the majority having 8. The intervals that are displayed for each scale are those for the selected octave. Each scale has a piano roll displayed above it which indicates the current octave. 
To select a different octave, simply click on that portion of the piano roll. The selected octave will then be highlighted.
You can hear a sample of the selected interval by clicking on the 'listen to octave' button 
, located next to the piano roll. You can also click on the numeric keys across the top of your keyboard to hear specific intervals.
Assigning Intervals to Triggers
To associate an interval with a trigger, simply drag the interval from the scale onto a trigger. Note that the intervals shown are for the selected octave only. You should select the appropriate octave first before dragging intervals onto triggers. You may also drag intervals from one trigger to another. Holding down the CTRL or CMD key while dragging will also perform a copy operation.
Note, when an interval is assigned to a trigger, you can no longer edit the note number or MIDI channel from the main edit mode. The scale has ownership of the trigger and will control these parameters. The trigger is also placed into 'melodic mode' automatically.
To remove an interval from a trigger, first select it and then click the 'remove interval' button (red 'X') from the mini toolbar at the bottom of the viewport.
Transposing Intervals
If after you've assigned intervals to triggers you should find that you want to alter the octave that they are associated with, first select one or more triggers and then click the 'up' or 'down' buttons from the mini toolbar. This will transpose the octaves up or down.
Altering the Scale
At any time you may change the type of scale and its root (tonic). Any triggers associated with intervals from that scale will update.
Each scale is associated with a particular MIDI channel, as displayed next to the piano roll. You may alter the channel at any time, which will also update all associated triggers.
Changing Note Durations
By default your Zendrum uses a very short note duration. To lengthen it, first select a number of triggers and then click the 'set duration' button from the mini toolbar that appears at the bottom of the viewport. From there you can choose an appropriate note duration.
Augmented and Diminished Intervals
In the upper-right corner of each interval of the scale (not in the viewport) is a small button. This button is a round, gray ball by default and indicates that note is natural or unaltered. Clicking the button will cause it to toggle between this state and also up and down arrow icons which indicate that the interval is augmented (raised a half step) or diminished (lowered). Note that the first interval (the tonic) and the last (the octave) cannot be altered. To affect those you should change the root note of the scale.