Entering Two‐Dimensional Input
|x Ctrl+^ y Ctrl+Space||use control keys that exist on most keyboards|
|x Ctrl+6 y Ctrl+Space||use control keys that should exist on all keyboards|
You type Ctrl+^ by holding down the Control key, then pressing the ^ key. As soon as you do this, your cursor will jump to a superscript position. You can then type anything you want and it will appear in that position.
You can remember the fact that Ctrl+^ gives you a superscript by thinking of Ctrl+^ as just a more immediate form of ^. When you type x^y, the Wolfram Language will leave this one‐dimensional form unchanged until you explicitly process it. But if you type x Ctrl+^ y then the Wolfram Language will immediately give you a superscript.
On a standard English‐language keyboard, the character ^ appears as the shifted version of 6. The Wolfram Language therefore accepts Ctrl+6 as an alternative to Ctrl+^. Note that if you are using something other than a standard English‐language keyboard, the Wolfram Language will almost always accept Ctrl+6 but may not accept Ctrl+^.
|x Ctrl+_ y Ctrl+Space||use control keys that exist on most keyboards|
|x Ctrl+- y Ctrl+Space||use control keys that should exist on all keyboards|
Subscripts in the Wolfram Language work very much like superscripts. However, whereas the Wolfram Language automatically interprets xy as x raised to the power y, it has no similar interpretation for xy. Instead, it just treats xy as a purely symbolic object.
|Ctrl+@ x Ctrl+Space||use control keys that exist on most keyboards|
|Ctrl+2 x Ctrl+Space||use control keys that should exist on all keyboards|
|Ctrl+^ or Ctrl+6||go to the superscript position|
|Ctrl+_ or Ctrl+-||go to the subscript position|
|Ctrl+@ or Ctrl+2||go into a square root|
|Ctrl+% or Ctrl+5||go from subscript to superscript or vice versa, or to the exponent position in a root|
|Ctrl+/||go to the denominator for a fraction|
|Ctrl+Space||return from a special position|
In addition to subscripts and superscripts, the Wolfram Language also supports the notion of underscripts and overscripts—elements that go directly underneath or above. Among other things, you can use underscripts and overscripts to enter the limits of sums and products.
|x Ctrl+$ y Ctrl+Space or x Ctrl+4 y Ctrl+Space|
|create an underscript|
|x Ctrl+& y Ctrl+Space or x Ctrl+7 y Ctrl+Space|
|create an overscript|