# `prep`: Control Value Program table

The `prep` table is an OpenType table.

class fontTools.ttLib.tables._p_r_e_p.table__p_r_e_p(tag=None)

  Bases: `table__f_p_g_m`

  Control Value Program table

  The `prep` table contains TrueType instructions that can makee font-wide alterations to the Control Value Table. It may potentially be executed before any glyph is processed.

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

  mergeMap(lst)