Border and fence lines
In the edit field commands and their specifications are separated
by border lines of the form
*.......... (asterisk and at least 10 dots).
If the the dots cover the visible line, the border line is displayed
as a continuos double line.
Without precaution, results of Survo operations may overlap other
operations or important text in the edit field. Such nuisances
are avoided by using fence lines of form
*########## (# and at least 10 dots) and activating commands with
a '#' in front of the command word.
B = More information about border lines
F = More information about fence lines