WaveWare Adaptive AlphaNet - Manual (Page 142)

Appendix E — Understanding message line positions (Top, Middle, Bottom, Fill)
142 5 — Appendix
• These signs are of varying heights and widths, but have character
blocks with spaces between.
Single-line signs (BetaBrite®, 215R & 215C, 220, 300 series, 400 series, Big
Dot®)
On a single-line sign, all characters line up at the bottom of the sign
and work their way up as many dots as the font supports. For example:
Exception conditions:
• If the sign receives a font that is larger than the sign can display, it
will size it down.
• 7-high normal characters are substituted for any 15-high normal
characters.
• 7-high fancy characters are substituted for any 15-high fancy
characters, and so on.
• If a graphic is received that is taller than the display can show, the top
seven rows are displayed.
• If a graphic is received that is wider than the display can show, it will
show the left-most columns of the picture.
• If a graphic is received that is smaller than seven dots tall, it will be
displayed from the bottom of the sign up, similar to the 5-dot
character set shown above.
• If a character set is not established in the message, 7-high normal
characters are used.
• If top, bottom, or fill positions are received, middle is used.
Two-line signs (4000 series)
Top position
On a double-line sign, the Top position is defined as the top 7 dots
of the sign and operates in the same manner as a one-line sign. See
exception conditions for a single-line 7-row sign.
Bottom position
The Bottom position is defined as the bottom 7 dots of the sign and
is treated as a one-line sign. See exception conditions for a for a single-
line 7-row sign.
Middle position
The Middle position is treated as though it were one line of 16 dots.
Each line of text presented on that line is prescanned to determine the
largest piece of text (or graphic object) to be displayed. The line of text is
then vertically centered based on the largest object. For example, if you
have a line of text which has mostly 5-high characters, but has one
10-high character, the line is viewed as a 10-row high line, and since this
is a 16-row sign, that leaves 6 extra rows — 3 blank rows on the top and 3