Typing Underscripts

Type the expression that will have an underscript.

Create an underscript by pressing the Control key and the = key at the same time.

Type an underscore into the placeholder (which is already selected).

Move the insertion point out of the underscript position up to the baseline by pressing the Control key and the Space bar at the same time.

Press the Control key and the = key at the same time.

This creates a pair of placeholders, one on the baseline and another in the underscript position.

Type the expression into the placeholder (which is already selected).

Press the Tab key to select the placeholder that is under the baseline.

Type an underscore.

Press the Control key and the Space bar at the same time to get out of the underscripted expression.