The list named "readings" is used for all sequences selected in all editors. This is automatically updated whenever a sequence is selected or deselected.
Inividual sequence names can be (de)selected by clicking on them with the left mouse button, or clicking and dragging out a region. This works well for a few sequences.
If you need to select all readings overlapping a specific consensus base or a region of consensus bases mark the range of the consensus you wish to select over by pressing and dragging the left mouse button (as if you were going to create an annotation) and then either right click in the consensus or use the Commands menu to choose Select Reads. When using the Commands menu you get a dialogue asking for confirmation of the start and end positions and the option of whether to select sequences that overlap this range or only those which are entirely containing within that range. When using the right-click popup on the consensus it simply takes the defaults (overlapping sequences).
Deselection follows the same procedure.