The Microsoft Excel File Format - OpenOffice.org

5 Worksheet/Workbook Records
• XF_VERT_ALIGN – Vertical Alignment (2 or 3 Bits), BIFF4-BIFF8
The vertical alignment consists of 2 bits (BIFF4) or 3 bits (BIFF5-BIFF8) and is part of a specific data byte. Vertical
alignment is not available in BIFF2 and BIFF3.
Value Vertical alignment
0 Top
1 Centred
2 Bottom
3 Justified (BIFF5-BIFF8)
4 Distributed (BIFF8, available in Excel 10.0 (Excel XP) and later only)
• XF_ORIENTATION – Text Orientation (2 Bits), BIFF4-BIFF5
In the BIFF versions BIFF4-BIFF5, text can be rotated in steps of 90 degrees or stacked. The orientation mode consists
of 2 bits and is part of a specific data byte. In BIFF8 a rotation angle occurs instead of these flags.
Value Text orientation
0 Not rotated
1 Letters are stacked top-to-bottom, but not rotated
2 Text is rotated 90 degrees counterclockwise
3 Text is rotated 90 degrees clockwise
• XF_ROTATION – Text Rotation Angle (1 Byte), BIFF8
Value Text rotation
0 Not rotated
1-90 1 to 90 degrees counterclockwise
91-180 1 to 90 degrees clockwise
255 Letters are stacked top-to-bottom, but not rotated
• XF_BORDER_34 – Cell Border Style (4 Bytes), BIFF3-BIFF4
Cell borders contain a line style and a line colour for each line of the border.
Bit Mask Contents
2-0 00000007 H Top line style (➜2.5.11)
7-3 000000F8 H Colour index (➜5.74) for top line colour
10-8 00000700 H Left line style (➜2.5.11)
15-11 0000F800 H Colour index (➜5.74) for left line colour
18-16 00070000 H Bottom line style (➜2.5.11)
23-19 00F80000 H Colour index (➜5.74) for bottom line colour
26-24 07000000 H Right line style (➜2.5.11)
31-27 F8000000 H Colour index (➜5.74) for right line colour
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