Using Brackets
The bracket columns let you enclose 2 or more condition lines, dividing the conditional expression into smaller units. This is only relevant when you have 3 or more condition lines and want to use the boolean Or operator.
You add brackets by clicking in the bracket columns and selecting an option. Up to triple brackets can be selected.
If you add several layers of brackets, these are evaluated from the inside out, starting with the innermost brackets.
Expressions within brackets are evaluated first.
Example
You can set up the Logical Editor to find all MIDI notes with the pitch C3, as well as all events (regardless of their type) set to MIDI channel 1.
You can set up the Logical Editor to find all notes that either have the pitch C3 or the MIDI channel 1 (but no non-note events).