As mentioned in a comment, if text in a pdf document is selectable as text or not, depends on whether the text is in the document as an image or as text. In the latter case, all pdf
viewers do support selecting text as far as I know.
No options with text in a pdf image?
You do have a few options however to make the text in a document "readable"
One relatively unknown, but imo very nice option to (also) convert pdf
images to text is gimageReader
:
It has a nice interface and reads the selected text, displayed next to your pdf document.
to install, use its ppa:
sudo add-apt-repository ppa:sandromani/gimagereader
sudo apt-get update
sudo apt-get install gimagereader
Note
You might need/want to additionally install tesseract
ocr tools for specific languages to use:
sudo apt-get install tesseract-ocr
and specific languages, e.g.
sudo apt-get install tesseract-ocr-eng
Specific languages can also easily be selected by using synaptic
.
Edit
(at least) From 18.04, gImageReader is in the repositories, so no need to add the ppa manually anymore.
Best Answer
you can use latex-beamer. you can install it if it's not usig:
you can get the official documentation of beamer from here.
This tex question would help you to achieve that
To view the ouput pdf you can use Okular, you can install it:
Read this also, this would help