If you open the context menu of the number field, it looks very much like those you open from text frames.
Only the subcommand Applicable XML node is different. With this command you group the element to an XML node without having to double click it first because it offers you a small window with the XML tree displaying all nodes, which you can currently assign to this element.
The commands Forward and Backward influence the arrangement of frames if you work with overlapping frames.
These commands will put the selected frame one level to the top and one level to the back. The layer number in the item will change. By default, all elements placed on the sheet belong to layer 10. Layers 9-0 are on top of layer 10, layer 11 and bigger are below layer 10.
Use the commands Font family, Font size and Font style to specify how your text should look.
In Alignment you choose from Left, Centered or Right.
If you want to have your text or the background colored, use the commands Text color and Background color.
Like text elements, number elements can be converted into other element types with the command Convert.
The function Uneditable is available for number elements as well.