WaveWare Adaptive AlphaNet - Manual (Page 145)

Appendix E — Understanding message line positions (Top, Middle, Bottom, Fill)
5 — Appendix 145
centerline with a second top/bottom command. For example:
Middle position
The Middle position is treated as though it were one line as many
dots high as the sign is tall. 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 that 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. Assuming this is a 24-row sign, that would leave 14 extra rows
— 7 blank rows on the top and 7 blank rows on the bottom. All text and
objects are then lined up to this new virtual bottom (the 21
st
line) and
treated the same as in a single line sign.
Exception conditions:
• If a graphic is received that is larger than what the display can show,
the top-most rows are displayed.
• If a graphic is received that is longer than the display can show, it will
show the left most columns of the picture.
• If a character set is not established in the message, 7-high normal
characters are used.
Fill position
On a 7000 series or AlphaVision™ sign, the Fill position indicates
that you wish to fit as much text on the screen as you can. On these signs,
as opposed to the 4000 series, you can select character sets larger than
7-high in the Fill position. The sign will start from the top of the screen
working down. If you select a 15-row character set, the sign will fit as
many 15-row lines of text on the screen as possible. As soon as the sign
detects that the next line will not fit, it will stop creating the current page
and display it. The next page will begin with the line that would not have
fit. If the text does not use up the entire display, the sign will center the
text vertically, splitting the blank space between the top and the bottom.
Exception conditions:
• If a graphic is received that is taller than seven rows high, 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.
Message
Centerline