LyX ⇒ Lyx and pdf quality issue

[rpatel2]

Hi

I recently started using latex for typing up documents. I am quite new to the using latex and hence the easiest editor i found to use was lyx.

However i am having some problems on pdf quality issues with lyx. Once i do my typing and export as a PDF, if you enlarge the pdf the writing is slightly staggered and as good quality as the mathematics.

I was wondering if there was any way to fix this. I have exported the pdf using other methods on lyx but the same issue arises again.

thanks

[meho_r]

1. Can you provide a .pdf file as an example in which this quality issue is noticable? Source file would be nice too.

2. Which pdf viewer are you using? Does this occur in printed material?

[rpatel2]

I have uploaded a file. If you look at the maths and normal writting you can see the quality is different.

[phi]

Make sure that LyX uses the following packages:

Code: Select all

\usepackage{lmodern}
\usepackage[T1]{fontenc}

[meho_r]

But still, it is strange that LyX didn't use T1 encoding automatically. On my machine it does, even if I leave everything on default settings.

However, phi's advice should work. If you still have problems, please, provide .lyx file producing that example of yours (you may have to put it in a .zip archive first and then attach).

[phi]

But still, it is strange that LyX didn't use T1 encoding automatically. On my machine it does, even if I leave everything on default settings.

That the PDF contains raster fonts indicates that LyX does use the T1 encoding, but that no vectorized version of Computer Modern in the T1 encoding (that is, CM-Super) is available, and that Latin Modern (or some other T1-encoded vector font) is not loaded.

[rpatel2]

here is the attached .lyx file in a winzip archive.

Can someone please provide me instructions on what i need to do. As i don't know exactly what to do.

I am running a windows 7 PC. My lyx version is 1.6.5

thanks

[meho_r]

First, try Latin Modern font, as phi suggested. You may set it in LyX: Document > Settings > Fonts > Roman > Latin Modern Roman (you may try another fonts present too and see if they work).

Or, alternatively, put the code provided by phi in the Preamble (Document > Settings > LaTeX Preamble).

Second, can you say are you using MiKTeX or TeXLive on your system? If you're using MiKTeX, it should be very easy (from what I heard): just run MiKTeX Package Manager (Start > Programs > MiKTeX > Browse Packages; this may look slightly different on W7), search for a package/font and install it. You should consult your TeX installation documentation.

[tienonline]

I got the same problems with the pdf quality with lyx, but solution which was suggested by PHI worked quite well. Thanks.

[CSMR]

I got the same problems with the pdf quality with lyx, but solution which was suggested by PHI worked quite well. Thanks.

I just checked with the beta of 2.0, and incredibly it's still defaults to bitmapped fonts. Of course, it's not a problem if you've found the error and have fixed it in the past. But new users are going to be expecting modern high quality typesetting and getting output similar in quality to a dot matrix printer from the default settings.

I'm going to leave a bug report with them, I hope this can be fixed in the final release. No excuse for using bitmapped fonts after beyond late 1980s.

Edit: bug report here: http://www.lyx.org/trac/ticket/7334