Figure 4.9 show's nip's main image processing window.
You can have many workspaces open at the same time. Switch between workspaces by clicking on the tabs along the bottom of the main window. Right-click on a tab for a useful context menu.
Use the File menu to create, load or save workspaces, to recover after crashes (load last automatically saved workspace) and to pop up the programming window (see §4.5). The Reload start stuff menu item flushes all of the things nip loaded when it started up, and reloads them again from scratch. It is handy if you've changed one of nip's system files behind it's back.
Use the Edit menu to select, group, delete and clone sets of objects. See the examples below.
Use the Insert menu to create new columns or to add images, matricies or other workspaces into your current workspace. See the examples below.
If you select one of these image processing operations, nip will apply that operation to the bottom items in the current column (however many are necessary -- two items for Math=>Arithmetic=>Add, for example, many more for some other operations), or alternatively, if you have selected some objects explicitly, it will try to apply the operation to the selected objects. See §4.4.3. As you move the mouse pointer over menu items nip tries to display some helpful information about the operation, including the number and type of arguments the operation expects.
If you left-click on the label, it changes to display the space nip has free internally for performing calculations. You can change this limit in the Preferences workspace. Click again to switch back to disc free.
If you have objects selected, this area changes to show the names of the selected objects.