Direct Manipulation
Some edits you can even do directly in the preview. If you want to edit a gap, padding or margin, just select the frame controlling that spacing and use the drag handle to set the spacing just right.

As you can see, the value displayed by the draghandles always matches the value displayed in the property panel, and vice versa.
Similarly, if you need to edit some text, simply double-click on the text and start typing.
