Hi Maria,
You can display a single label (or labels) in tksurfer by loading the aparc annotation onto fsaverage; then, simply click on the label you're interested in, and click File, then Label, and Save Selected Label. This will let you save out a single label from aparc, which can these easily be loaded onto fsaverage on its own. You can of course also overlay multiple labels in tksurfer that you've saved out in this way (and naturally change colour schemes if you're so inclined).
Best,
Dan
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displaying a single label from aparc in tksurfer