Remember, the number and text will often change from page to page.īasically I copy any text that needs to be removed and then replace the number with \d+. In the following book there was an alternating header with author name and title. Often, however, there will be headers that need to be removed. If that’s all you need to exclude, then press “OK” and the conversion will begin. Your search expression appears in the left with the replacement text (blank in this case) on the left. Press “Add” or your conversion won’t include the search and replace you just constructed. Press okay and you’ll be sent back to the Search and Replace window. The replace term is left completely blank. Now when you scroll down, those pesky stray line numbers should be highlighted. I’m sure there is a more sophisticated query but it works for me. The | is called a pipe and it is used to separate sets of regular expressions. Or, if you’re really savvy, you’ll use the \w code. To construct the search text, you would simply add the S or N before or after the number. Or sometimes the line numbers will end with S and N. The yellow highlighted text will be removed:Īs you scroll down, sometimes you will see these line numbers that start with S or N. You can click “Test” to determine whether your expression is going to strip out the right text. The “+” is a greedy qualifier which means it will remove as many digits as possible. The letter “d” in regexpression stands for single character that is a digit. The \d+ tells the program that you want to remove every digit whether it is 01 or 501.To remove the numbers and the which is CSS for a line break, your code would be:
There’s a number followed by, then a line break. This will bring up a dialogue box that shows what the PDF looks like before conversion. The first thing you want to do is click on the wizard button. As the screenshot says, search and replace uses regular expressions. Make sure you select PDF as your input and then either Mobi or ePub (or whatever format you prefer) as output. Under “Convert books” select “Search and Replace”: When you read the PDF you can’t see them, but when you convert to ePub or Mobi they appear within the text and render the converted book unreadable. Some PDFs have line numbers that are on a hidden layer. I’m going to address three of the most common problems when converting a PDF to ePub and what you can do to address those problems.
There are some tips and tricks in Calibre’s PDF conversion engine that can be used to produce very clean and readable PDFs. Often there will be stray letters or numbers or headers that affect the output of an ebook. A couple of weeks ago, after this post about inserting the blurb at the front of an ebook, a reader emailed me asking about cleaning up PDF files when converting to ePub.
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