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Microsoft Typography | Developer information | VOLT | VOLT release notes
Start | Project window | Glyph grid | Glyph group | GSUB | GPOS | Proofing | File | Samples

The glyph grid

Edit Glyphs The glyph grid lists all glyphs in the font with their names, glyph IDs, corresponding CMAP entries, assigned types and component numbers. All this information (except the glyph IDs themselves) can be changed through the top part of the tool. Select Tools, Options to set the size of the glyphs displayed in the grid.

Before working on a font all glyphs contained within it should be named. This can be a tedious and time-consuming process especially for large fonts. VOLT includes several options to help speed up this task and help you reuse glyph names used in other fonts. These options are documented in the section on Import and Export options.

The VOLT Glyph Editor

The VOLT Glyph Editor

To change glyph information, select a glyph in the grid and change its data above. Clicking somewhere else in the grid or otherwise changing focus commits your changes.

Glyph Type

The 'Find' button (also accessible via Ctrl-F) allows you to search for glyphs by name or Unicode value (the glyphs appear ordered by their IDs).

Glyph name

While editing glyph names, pressing enter commits the name change and automatically goes to the next glyph. This is convenient for entering a number of glyph names in a row. Glyph names may contain latin letters and digits. In VOLT version 1.1 we allow the use of '.' and '_' characters within glyph names.

Glyph Type Glyph type

Valid options are simple, ligature, mark and component. Glyph types are defined in the Glyph Class Definition Table section of the OpenType specification. A Simple glyph is defined as a single character, spacing glyph. A Ligature glyph is defined as a multiple character, spacing glyph. A Mark glyph is defined as a non-spacing combining glyph and a Component glyph is defined as part of a single character, spacing glyph.

Tip: Globally set all glyphs to simple and individually change those that should be set to other types. To do this define a glyph group that contains all the glyphs (e.g. [glyph1 - glyphxxxx]) and then select 'Mark all as...' in the group tool.

Glyph ID

This field cannot be edited.


VOLT lets you edit this field, offering basic cmap editing functionality. VOLT version 1.0 did not allow one glyph to have multiple cmap entries. With VOLT version 1.1 this limitation has been removed. You can enter one or more Unicode code points using U+xxxx, 0x or &H for each glyph. A valid entry will be displayed as U+xxxx once entered. To assign multiple Unicode code points to a single glyph use the format format: 'U+xxxx,U+xxxx,...'. You may substitute the comma with a semicolon. With VOLT 1.1 we also added support for surrogate glyphs. To enter a surrogate character code, use surrogate pairs such as 'U+D800DC00'.


For glyphs defined as ligatures this indicates the number of components and is used later for defining caret placement.

this page was last updated 21 October 2000
© 2000 Microsoft Corporation. All rights reserved. Terms of use.
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Start | Project window | Glyph grid | Glyph group | GSUB | GPOS | Proofing | File | Samples
Microsoft Typography | Developer information | VOLT | VOLT release notes