What software can I use to write on PDFs?

Solution 1:

xournal. I use it in conjunction with python-whiteboard daily. After you're done, just export as pdf. (The video shows how I use it.)

https://www.youtube.com/watch?v=BY6ZEWNigjo

Master PDF Editor can be used to edit PDF files in Linux. It enables you to create, edit, view, encrypt, sign and print interactive PDF documents.

1. Download Application

It may not be the latest release, but, in this case, a message will pop-up to update when launching the application.

1.1. 32 bits

wget https://code-industry.net/public/master-pdf-editor-4.3.89_i386.deb -O master-pdf-editor.deb

1.2. 64 bits

wget https://code-industry.net/public/master-pdf-editor-4.3.89_qt5.amd64.deb -O master-pdf-editor.deb

2. Install Application

sudo dpkg -i master-pdf-editor.deb

3. Install Dependencies if necessary

sudo apt-get install -f

Uninstall

sudo apt-get remove master-pdf-editor