entering vectors and +/- sign

[Joe Horn]

(08-09-2014 03:08 PM)Helge Gabert Wrote:  Expands and contracts rows/columns, and enables one to traverse large matrices quickly with the arrow keys. Hit - or + when you're on the symbol and you'll see.

Less well known is the fact that pressing × (multiply) creates a new row or column BEFORE the current one (unlike + which creates it AFTER the current one). It's the only way to insert a new first row or new first column.