MacJournal 6 provides some new commands to make it easier to navigate to different points in the document window without needing to use your mouse. The commands can be viewed by selecting Change Focus To from the View menu.
Here is a list of these commands (and what they are used for):
F1 - Topic
Changes focus to the topic field in the current window.
F2 - Text
Changes focus to the text pane (the pane where entries are composed) in the current window.
F3 - Sidebar
Changes focus to the Sidebar in the current window. You should now be able to navigate within the sidebar with the arrow keys on your keyboard.
F4 - Search
Changes focus to the Search field (in the toolbar) in the current window.
When I press F1, F2, (or another function key), the brightness of my monitor changes or Dashboard or Mission Control shows. Why is this?
On newer Macs, the function keys (F1-F12) on the top row of the keyboard have been assigned special functions. These keys provide controls to change the brighness and contrast of the monitor, change system volume, display Dashboard, or even to pause and advance playback of audio in iTunes. Some Macs require you to hold the function (fn) key in order to use these controls. Recently, though, these controls have become the default functions for these keys; where this is the case, it is necessary to hold the function (fn) key while pressing the function keys in order to use them as F1, F2, F3, and so-on.
Typically, keyboards that support these special functions have pictures printed on the keys, to show which special function each key is used for.
For an overview of the special functions that have been assigned to the function keys, see this knowledge base article from Apple.
Apple provides instructions to remove these special function assignments (to make it possible to use these keys as F1, F2, and so-on) in this knowledge base article.