Here there is an invisible space between the
, interpreted as multiplication.
In the buttons in a palette, you often want to set up a template with placeholders to indicate where expressions should be inserted. \[SelectionPlaceholder]
marks the position where an expression that is currently selected should be inserted when the contents of the button are pasted. \[Placeholder]
marks other positions where subsequent expressions can be inserted. The Tab
key will take you from one such position to the next.
In describing how to enter input into Mathematica
, it is sometimes useful to give explicit representations for keys you should press. You can do this using characters like
. Note that
are actually treated as spacing characters by Mathematica
The fonts that are distributed with Mathematica
contain their own renderings of many ordinary keyboard characters. The reason for this is that standard system fonts often do not contain appropriate renderings. For example,
are often drawn small and above the centerline, while for clarity in Mathematica
they must be drawn larger and centered on the centerline.