# `VDMX`: Vertical Device Metrics table

The `VDMX` table is an OpenType table.

class fontTools.ttLib.tables.V_D_M_X_.table_V_D_M_X_(tag=None)

  Bases: `DefaultTable`

  Vertical Device Metrics table

  The `VDMX` table records changes to the vertical glyph minima and maxima that result from Truetype instructions.

  See also https://learn.microsoft.com/en-us/typography/opentype/spec/vdmx

  decompile(data, ttFont)
  compile(ttFont)
  toXML(writer, ttFont)
  fromXML(name, attrs, content, ttFont)