The Primeval Awareness feature for Rangers states:
you can use your action and expend one ranger spell slot to focus your awareness on the region around you. For 1 minute per level of the spell slot you expend, you can sense whether the following types of creatures are present within 1 mile of you (or within up to 6 miles if you are in your favored terrain).
While the non-favored terrain section lists a specific range, the favored terrain version says "up to." Does this mean I can choose the range? If so, is 1 mile the minimum or is there no minimum?