Direct Out has internal option jumpers for each channel. The factory default setting is pre-fade (following the pre/post-EQ setting). This may be changed to post-fade via internal jumpers for each channel (see the manual, pages 37-38).
The "Pre-EQ" switch (found between aux sends 2 and 3) affects the Direct Output: "The up position is post-EQ, pressed is pre-insert and pre-EQ. Note that this setting affects all pre-fade sends from the channel, including auxes and direct output." (p. 38). And, on page 32, it states in regards to the direct output, "Use the channel recessed PRE-EQ switches to select either post-EQ or pre-insert, pre-EQ for your recording."
Four matrix outputs (1/4"), which can be fed by any of the 8 groups, the l-r bus or an external in jack (1/4").
If you were to plug signal into the matrix ext input 1 and 2, then "with nothing plugged into EXT IN 3 and 4 the [ext input 1-2] signals are automatically linked across making the same [signal] available to..." all four matrixes.
The group (aux) and LRM mix inserts are pre-fader and operate at -2dBu.
In "Monitor Mode" (when a REV mode switch next to the aux masters is depressed) the aux and group outputs are swapped, see the manual. For example, the aux outs: "In monitor mode, these outputs reverse with the group and LR XLR connections" (page 15).