LiquidText (note: there is a LiquidText glitch where you must do all of your highlighting in a single session).Thus far, we've had positive results with the following apps (provided you are working with a clean PDF to begin with): Use the concatenation feature described here: How to Combine Highlights On-the-Fly with Readwise. What happens if a highlight spans two pages?ĭue to limitations of the PDF file format, the highlight will be broken into two separate highlights. The absolute worst are PDF presentations with text all over the page. You can still extract highlights from multi-column PDFs: just be prepared for things to sometime fall out of order. ![]() Text in a single column extracts much better (read: much better) than two or three column PDFs. Highlights extract much cleaner from digital PDFs than scanned PDFs with OCR applied. PDF is a fickle file format, so some PDFs highlight better than others: You can also upload PDFs by selecting the PDF Import option from Add Highlights. To import highlights from a PDF, simply email the highlighted PDF file as an attachment to an email address associated with your Readwise account). If it runs perfectly, this is the final confirmation that the problem lies with your software.Yes! But please note that support for PDF highlights is in perpetual beta so you may discover a new bug from time to time (which we will promptly attempt to fix). Download any of the programs we cover and open the PDF file with it. Can't decide what to choose? We have compiled a guide on the best PDF readers to assist you in this endeavor. Try opening the same PDF in another PDF viewer to verify the issue further. If it doesn't work on the other file, too, it's a software issue. To confirm this, open up a different PDF and select the text to highlight. Check the Software for Issuesĭespite this being fairly obvious, you may occasionally be unable to highlight text in PDF files because of a deep-rooted issue in your PDF viewer. Several online tools allow you to remove constraints, such as Online2pdf. ![]() Alternatively, you can remove the restrictions set on the PDF on your own. If he has, request an unrestricted version of the PDF file. So, confirm whether the PDF's author has placed certain restrictions on it. Considering that possibility, the PDF that doesn't allow you to highlight or select text may also be restricted to read-only mode. Thanks to advances in encryption technology, it is possible to safeguard PDFs with passwords and restrict specific actions, such as printing, editing, etc. Protecting confidential data with PDF encryption is a great way to keep prying eyes at bay.
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