When you're using a subset, the word count information is shown exactly for words that don't occur too many times. For instance, ΓÇ£23/92 FNORDΓÇ¥ means that 23 out of a total of 92 instances of the word ΓÇ£FNORDΓÇ¥ are in your subset. Words that occur more often than a chosen threshhold are shown as an approximate percentage, as in the above example with ΓÇ£COMPUTERΓÇ¥.
Subset browsing can be much more sophisticated than than our first simple example showed. You can add or subtract the neighborhoods of words in various orders, so that your subset holds a complex combination of terms. For instance, it's easy with a few clicks to define a subset consisting of the words in the neighborhoods of ΓÇ£HYPERCARDΓÇ¥, ΓÇ£HYPERTALKΓÇ¥, or ΓÇ£STACKΓÇ¥ but not in the vicinity of ΓÇ£XFCNΓÇ¥ or ΓÇ£XCMDΓÇ¥. And by building two subsets, and then intersecting or joining them using the AND or OR buttons between the Index Views, you can create any Boolean combination you please.
The mechanics of subset definition is straightforward and will become intuitive in a very short time. When you click on an Empty button, if you don't have a currently-active subset then a new, empty one is created for you. If, contrariwise, you want to leave a subset and go back to browsing the full database file, just click on the Fill button associated with one of the Index Views.
