The PDF won't sink in - what helps when I'm just staring blankly?
When your eyes keep reading but nothing is getting through, you don't need more willpower. You need a short reset between your head and the material.
For the next few minutes
When a PDF suddenly won't sink in, it's often not a sign of being slow, but of an overloaded working memory. Sleep deprivation, pressure, and too many open loops turn reading into a purely optical motion.
The first helpful step is usually to go in the opposite direction rather than pushing harder: close the PDF for a moment, write down exactly what isn't going in, drink some water, shift your gaze, breathe out. Only then go back in.
When you return, don't take on the whole document - just the next section. One paragraph, one margin note, three keywords. Understanding often comes back only once the expectation gets smaller.
Step by step
1. Close the PDF completely for 60 seconds
Don't scroll, don't leave it open. Actually step away for a moment.
2. Write down one question
What isn't going in right now - a term, the logic, or the order of things?
3. Come back with one section
Just the next paragraph, not the whole document.
Common questions
Should I just keep sitting there longer?
Not at first. When reading is nothing but friction, more time in the seat often means less retention. A short reset is frequently faster than continuing to stare your way through it.
Does that mean I just don't understand the material right now?
Not necessarily. Often it's your ability to take things in that's blocked, not your actual understanding. That's a real difference - and a short re-entry works far better for exactly that than self-criticism does.