# Difference between revisions of "Command/vphantom"

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BruceH2020 (talk | contribs) (Framed the example to make it clearer) |
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<cd:description><!-- the long description of the command goes here --> | <cd:description><!-- the long description of the command goes here --> | ||

<tt>\vphantom</tt> typesets the supplied content and then throws it away, leaving a 'phantom' i.e. an invisible item that has zero width but the maximum height of the phantom text. This then influences the height of what follows.</cd:description> | <tt>\vphantom</tt> typesets the supplied content and then throws it away, leaving a 'phantom' i.e. an invisible item that has zero width but the maximum height of the phantom text. This then influences the height of what follows.</cd:description> | ||

− | <cd:examples><cd:example title="Aligning the | + | <cd:examples><cd:example title="Aligning the top of square root signs (radicals)">In this example the expressions have been framed to better highlight the differences. The third cube root contains a 'phantom' digit 4 so that its height matches the second one. The first and last don't have this phantom and have a smaller root sign. (Actually, it's the same sized character but lower in the line so it protrudes below the baseline a little.) |

+ | |||

+ | <context source="yes"> | ||

+ | \setuppapersize [A7] [A7] | ||

+ | \starttext | ||

+ | \framed{ | ||

\startformula | \startformula | ||

− | \sqrt[3]{4n} \ | + | \sqrt[3] {n} \quad \sqrt[3]{4n} \quad \sqrt[3] {\vphantom{4} n} \quad \sqrt[3] {n} |

\stopformula | \stopformula | ||

− | + | } | |

− | \ | + | \stoptext |

− | + | </context> | |

− | + | </cd:example></cd:examples> | |

<cd:notes></cd:notes> | <cd:notes></cd:notes> | ||

<cd:seealso> | <cd:seealso> |

## Latest revision as of 14:00, 22 August 2021

## Contents

# \vphantom

## Summary

The command `\vphantom` creates an invisible item that has height but no width.

## Settings

## Description

`\vphantom` typesets the supplied content and then throws it away, leaving a 'phantom' i.e. an invisible item that has zero width but the maximum height of the phantom text. This then influences the height of what follows.

## Examples

### Aligning the top of square root signs (radicals)

In this example the expressions have been framed to better highlight the differences. The third cube root contains a 'phantom' digit 4 so that its height matches the second one. The first and last don't have this phantom and have a smaller root sign. (Actually, it's the same sized character but lower in the line so it protrudes below the baseline a little.)

\setuppapersize [A7] [A7] \starttext \framed{ \startformula \sqrt[3] {n} \quad \sqrt[3]{4n} \quad \sqrt[3] {\vphantom{4} n} \quad \sqrt[3] {n} \stopformula } \stoptext