Key

Action

Delete or Backspace

Clears selected text (same as Edit | Clear).

←, →, ↑, or ↓

Moves the insertion point by one character left or right, or by one line up or down.

Ctrl+← or Ctrl+→

Moves the insertion point by one word left or right.

Shift+←  or Shift+→

Extends or contracts the currently selected text by one character left or right.

Shift+↑ or Shift+↓

Extends or contracts the currently selected text by one line up or down.

Shift+Ctrl+← or Shift+Ctrl+→

Extends or contracts the currently selected text by one word left or right.

Ctrl+I (Windows) or I (Mac)

Turns italic style on or off for the selected text.

Ctrl+B (Windows) or B (Mac)

Turns bold style on or off for the selected text.

Ctrl+U (Windows) or U (Mac)

Turns underline style on or off for the selected text.

Ctrl+C/X (Windows) or C/X (Mac)

Copies (C) or cuts (X) the selected text to the clipboard.

Ctrl+V (Windows) or V (Mac)

Pastes the text from the clipboard at the insertion point.

Ctrl+Z/R (Windows) or Z/R (Mac)

Undoes (Z) or redoes (R) the last editing operation.

Tab and Shift-Tab

When the caption includes "?" place-holders in  fractions, square roots, superscripts and subscripts, and grouping symbols, the Tab key moves to the next "?" placeholder, and Shift-Tab moves to the previous one.

Alt+Arrow (Windows) Option+Arrow (Mac)

Sets text alignment when editing a caption. Use the left arrow for left alignment, the right arrow for right alignment, and either the up or down arrow for centered alignment.