In a GUI, the fillings are known as widgets.
There are lots of different widgets to choose from, each suited to a specific task.

Nearly every widget needs a TITLE.
This is a unique name for the widget, so that later you can get information from that widget, or change it.

Nearly all widgets in appJar provide the same three functions:

On top of these, there is a common set of functions for changing widgets.
As well as some specialist functions, unique to each widget (see below).

Auto-Labelled Widgets

It's possible to automatically include a label alongside a lot of the widgets.
Both the label and widget will be placed in the same grid space.
Simply add the word Label to the command when adding the widget:

See the relevant section for a description of what the widget does.