Document Classes ⇒ Margins - recto & verso - Memoir

[Julian_S_Moore]

24 hours in and I have a page... actually two.... but they don't look they way they ought to...

This is what I have running: WinEdt 5.5 with MikTeX 2.7 under Vista HP, notebook with 1680x1050 display at 72dpi.

Problems:
a) The page as seen in Acrobat Reader (8.1.3) is only 21.6cm x 13.6 cm (8.5in x 5.35in) when for medium octavo it should be (Document Properties confirms the document is medium octavo, i.e. 9in x 5.75in) but the image is -5.6% undersize in height and -7% undersize in width.

Thinking this is just a screen resolution problem I drew a 15cm x 15cm square in word and measured 14.8cm x14.8cm - only 1.33% undersize (which I can live with). I guess Acrobat Reader isn't that precise, but how can it be asymmetric?

If I want to proof things properly, how would I, say, print onto a4 with stock/page edges shown?

b) More importantly, and even allowing for display issues, the margins don't seem to be what I thought I had set them to be, and the verso is completely different (spine/edge) from the recto... and only the recto spine is what I thought I had set it to be

Measuring off screen (Acrobat Reader "Actual Size" = 100% display)
Recto uppermargin is 4.2cm = 1.65in; spine = 1.8cm = 0.7in = 50pt; edge = 1.2cm = 0.48in = 35pt; lower margin = 1.65cm = 0.65in = 47pt
Verso uppermargin is as per recto; but the spine = 0.45cm = 0.18in = 12.8pt and the edge is 2.8cm = 1.1in = 79pt

Here's the code...

\documentclass[mediumvopaper, twoside, openright, 10pt]{memoir}
\settrims{0pt}{0pt} % temporary until I know more about Stock sizes vs Page sizes
\setulmarginsandblock{1.05in}{1.31in}{*} % Upper, Lower, Ratio - specify both margins and let the block width be calculated from them
\setlrmarginsandblock{50pt}{50pt}{*} % Spine, Edge, Ratio - specify both margins and let the block eight be calculated from them
\begin{document}
\pagestyle{plain} % force the folio to the bottom
\parskip = 3pt
\begin{slshape}
\centering
blah blah blah (~500 words)
\end{slshape}
\end{document}

Any ideas where/how I've goofed?

Ta, Julian

[Julian_S_Moore]

\checkandfixthelayout was missing.

[daleif]

I might recommend using

\checkandfixthelayout[nearest]

because \checkandfixthelayout does some calculates such that the text height equals an integral number of lines. By default \checkandfixthelayout choses the one less than or equal to the requested textheight which might be almost a line shorter than the requested height. using the algorithm behind [nearest] we get the textheight that is a close to the requested textheight as possible using an intergal number of lines.

See the memoir manual for more information