Okular Configuration
Enable Tab View
Prevent multiple windows being opened for each new PDF opened by enabling tab view.
Navigate to Program Features via:
Settings > Configure Okular > General > Program Features
Check the Open new files in tabs option, as well as the
Switch to existing tab if the file is already open option if it
is not already checked.
Enable Continuous Scrolling
Prevent disorientation caused by jumps between pages by enabling continuous scrolling.
Navigate to View Mode via:
View > View Mode
Check the Continuous option.