scook has the answer. I believe that's officially called the "Track Control Filter" (or something like that). There are actually three options you can choose that will show the ins/outs/sends.
"All" (which is in scook's picture)
i/o (which of course stands for ins/outs)
Custom (which allows you to choose what is shown if you click on the "Track Control Manager" option in the Track Control Filter menu. In that dialog you can actually create, name and save your own track control presets and they will appear in the filter options. Otherwise the settings in that dialog will apply to the "Custom" option in the filter menu... and of course overide your previous setting for the Custom option).