Text comes in four basic sizes, 15/16 row normal, Seven row normal – WaveWare Adaptive AlphaNet User Manual
Page 148: Five row

Appendix F — How text and graphics are displayed on signs
148
5 — Appendix
Text comes in four basic sizes
The Characters menu contains a list of available text sizes, such as
15/16 Row Normal and Ten Row, and options such as Wide and Flashing:
The four basic text sizes are 15/16 Row (Normal and Fancy), Ten
Row, Seven Row (Normal and Fancy), and Five Row. These are also
available in compressed form. Customized variations can be installed into
the sign’s firmware and accessed in the software.
Below are examples of how the message Las Vegas $85, Chicago
$199 would appear on a two-line 4120C or 4120R sign in all four basic
text sizes (except Ten Row):
15/16 Row Normal
Characters are 15 or 16 rows high and about 9 columns wide:
Seven Row Normal
Characters are 7 rows high and about 6 columns wide:
Five Row
Characters are 5 rows high and about 5 columns wide:
Text sizes are selected from the
Characters menu. (The default
text size is Seven Row Normal.)
Other text options can also be
selected here.