Since master PDF editor is not available from the Ubuntu software repository, so you can’t use apt-get or apt to install it. First, you need to download the deb package from the official website.
Alternatively, you can open a terminal window and download master PDF editor 5 with the following command.
apt package manager to install it by clicking on the downloaded file.
Alternativley you can use the terminal application. For example, if the package is downloaded to
~/Downloads/ directory, then open up a terminal window and run the following command:
sudo apt install ~/Downloads/master-pdf-editor-*.deb
If there are any dependencies,
apt package manager will automatically install them.