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Fixed-Length Multi-Byte Functions Codes for fixed-length multi-byte functions (240 (0xF0) through 255 (0xFF)) always appear twice. The first occurrence is the begin gate, and a second occurrence is the end gate. The length of each function is fixed and listed after the function code. #### 0xF0 Extended Character
    Size = 4

    <240 (0xF0)>

    [WP character] = (<character> <WP character set number>)

    <240 (0xF0)>
#### 0xF1 Undo
    Size = 5

    <241 (0xF1)>

    <undo type>

      0 = start of invalid text

      1 = end of invalid text

      2 = start of valid text

      3 = end valid text

    [undo level] Internal number used to determine which functions were

    inserted or deleted as part of a single operation.  When undo is

    performed, everything at the same level is undone.

    <241 (0xF1)>
#### 0xF2 Attribute On
    Size = 3

    <242 (0xF2)>

    <attribute>

      bit 7: 1 = Ignore the attributed text on/off codes.  Used when an

    attributed block of text becomes a subset of a larger attribute block

    of the same type, such as bolding a sentence that contains a word

    already bolded.  Bit 7 of the enclosed Bold On code would be set to 1.

      bit 6: reserved

      bits 0-5: attribute

        0 = extra large (chapter heading)

        1 = very large (heading)

        2 = large (sub-heading)

        3 = small print

        4 = fine print

        5 = superscript

        6 = subscript

        7 = outline

        8 = italics

        9 = shadow

        10 = redline

        11 = double underline

        12 = bold

        13 = strikeout

        14 = underline

        15 = small caps

        16 = blink

        17 = reverse video

    <242 (0xF2)>
#### 0xF3 Attribute Off
    Size = 3

    <243 (0xF3)>

    <attribute> See Attribute On for description of attributes.

    <243 (0xF3)>
#### 0xF4 - 0xFF Reserved - 245 (0xF4) to 255 (0xFF)
Function | Size
244 (0xF4) | Size = 3
245 (0xF5) | Size = 3
246 (0xF6) | Size = 4
247 (0xF7) | Size = 4
248 (0xF8) | Size = 4
249 (0xF9) | Size = 5
250 (0xFA) | Size = 5
251 (0xFB) | Size = 6
252 (0xFC) | Size = 6
253 (0xFD) | Size = 8
254 (0xFE) | Size = 8
255 (0xFF) | Cannot be used. -1 is reserved so no size is assigned to this value.
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