Since it's a study guide, summarizing key points and providing revision checklists could aid in exam prep. Also, since the user wants a portable PDF, the document should be well-organized with sections, headings, and maybe bookmarks for easy navigation. Adding QR codes linking to videos or simulations might enhance it.
I should verify if there are standard textbooks or official Queensland education department sources that the guide can reference. Maybe suggest additional resources at the end. Also, ensure that all chemical equations are correctly balanced and any terminology is consistent with the curriculum.
Lastly, test the PDF's functionality. Can it be opened on various devices? Are the hyperlinks working if included? Maybe create a table of contents for easy jumping to sections. Including a feedback section where users can comment or suggest improvements could be a nice touch for a community resource.