The browser at the top of the dictionary window is the primary way of navigating the dictionary.

Select in the browser to display the corresponding dictionary entry in the info pane.

In the above illustration, we have clicked the Suites entry in the first column so as to pick a suite in the second column. In the second column, we have clicked the Pairs Suite so as to pick a category in the third column. In the third column is the actual selection, the Commands listing. This means that all commands in this suite are listed in the info pane. (It also means that all commands in this suite are listed in the fourth column. It so happens that this tiny suite has only one command.)

To select more than than one listing in a column, Shift-click to select a range of entries, or Command-click to select multiple individual entries. Choose Edit > Select All to select all entries in a column, thus displaying information for all of them in the info pane.

So, in the above illustration, you could Command-click Enumerations in the third column. Both Commands and Enumerations in the third column would be selected, and so all commands and enumerations in the Pairs Suite would be displayed in the info pane.

You can also use arrow keys to navigate the browser, though it is probably more common to use the mouse.

Here is a discussion of the various rows, columns, and icons you’ll see displayed in the browser (and in search results).