Is there a software for writing anywhere on the system with a pen/stylus on the touchscreen?

Question

I'd like to write on top of my PDFs used for making presentations on my laptop with touchscreen. I do not need to save what I write, but I would like to circle or underline things, possibly write some equations, etc. and then erase them and move on.

Drawing tablets bring software of the sort I speak. Anything out there I could use with my Ubuntu 14.04? Thanks!

Answer 1

I 'll recommend you to try Okular. It gives you lots of such options to edit your pdf files. Open your pdf using Okular and press F6 or

Tools --> Review

It will show some tabs on the left side. Selecting these will enable you to do many functions such as underline, highlight, freehand line, ellipse, polygon, etc. Using freehand line option, you can write on your pdf. You can even edit these functions.

To install Okular, type these commands in your terminal:

sudo apt-get install Okular

Answer 2

Unfortunately the freehand annotation for Okular allows only one continuous line at a time. Cannot write with a pen with Okular.

Allowing pen writing on Okular would be a killer feature for the program. Until that is implemented, I'm opening PDFs in Xournal, which is an amazing, stable, powerful notetaking program in its own right