Setting the direct out per mono input channel to pre-fade is done by moving link J33 to J32 and will make the direct output follow the settings of the pre-fade aux send (post-EQ, post-On as standard) links.
The best way to do this is probably to cut and separate the ends of the wire in 'J33’ and fit a new link in 'J32'. This makes it a lot easier to go back again should you wish to.
The pre-fader direct out then follows the source set for the pre-fader aux sends, as shown in the block diagram in the User Guide (default is post-EQ, post-ON).
To change this for the direct outputs and the pre-fade auxes, you may need to change J22 / J23 and J28 / J29.
With good tools it should not be necessary to remove the channels from the mixer to do this, but it may help to remove alternate channels for space.
We recommend that this is undertaken by a qualified service technician and you should contact your local A&H distributor if you require further assistance.