Minor misunderstanding of the Emacs tutorial

Minor misunderstanding of the Emacs tutorial

[Valera Rozuvan]

Hi All,

The first two screens of the Emacs tutorial (which can be accessed by
C-h t) explain how to move forward and backward by an entire screen
using C-v and M-v. The second screen says (at the top):

"Note that there is an overlap of two lines when you move from screen
to screen; this provides some continuity so you can continue reading
the text."

However, I get an overlap of three lines. I am using GNU Emacs
24.1.50.1 (i686-pc-linux-gnu, GTK+ Version 2.20.1) under X. Is this a
configuration option which differs with each new build? Or is this
part of the tutorial from the old days, when the overlap was actually
two lines?

Regards,
Valera

Re: Minor misunderstanding of the Emacs tutorial

[Eli Zaretskii]

> Date: Mon, 2 Jul 2012 19:05:31 +0300
> From: Valera Rozuvan <valera.rozuvan@gmail.com>
> 
> "Note that there is an overlap of two lines when you move from screen
> to screen; this provides some continuity so you can continue reading
> the text."
> 
> However, I get an overlap of three lines. I am using GNU Emacs
> 24.1.50.1 (i686-pc-linux-gnu, GTK+ Version 2.20.1) under X. Is this a
> configuration option which differs with each new build? Or is this
> part of the tutorial from the old days, when the overlap was actually
> two lines?

No, the default is still the same.  However, depending on the font you
are using, it could be that the a partial or even a whole 3rd line
will show, because when variable-size fonts are involved, it is hard
to compute in advance how many pixels to move for N lines.

Try in "emacs -nw", and I think you will see 2-line overlap.  If that
doesn't happen, either, perhaps there are local changes to your Emacs.

Re: Minor misunderstanding of the Emacs tutorial

[Valera Rozuvan]

From: Eli Zaretskii

> Try in "emacs -nw", and I think you will see 2-line overlap.  If that
> doesn't happen, either, perhaps there are local changes to your Emacs.

Yes, this works.

Thanks,
Valera Rozuvan