As we saw in Introduction to data trees, each node has a data area called an article, where you can store information. Whenever you select a node in the Tree pane, its corresponding article appears in the Article pane, where you can add or edit text, using TreePad's built-in editor.
TreePad offers you the choice of entering information using plain text or rich text. Plain text has no formatting and the only variety is to use upper or lower case. The text produced by Microsoft Windows NotePad is an example of this.
Rich text includes boldfacing, italics, underlining, font face, size and color changes, bulleting, indentation, centering, justification, etc. It makes text much more interesting to read. So why use plain text at all? As we will see later, there are advantages and disadvantages to both. See Formatting text.
TreePad articles can be edited just as in any advanced Word Processor.
Before starting to delve deeply into article commands, ensure you are familiar with various ways of switching between Tree and Article panes. To sum up, left-click in either pane to focus on it, or use Ctrl+Tab from the keyboard. Right-clicking in the pane will not only focus on it but also bring up its context menu. (Another way to display the context menu for the current pane is to press Shift+F10 from the keyboard; press Shift+F10 again or Esc, or click on the pane itself to close the menu.)
The Accessory pane
Below the Article pane in TreePad's main window is a row of buttons labelled Article, Icons, etc. These comprise the Article button bar; clicking any will open a special window pane for that function. Taken together, all these panes will be referred to as the Accessory pane. You may wish to follow these hyperlinks and learn a bit more about them before moving on.