For anyone new to Roll20 who is also curious: between this thread and the one Vince linked, there appears that there might be a misconception about sheets. A PDF sheet is not suitable for Roll20 play. A proper Roll20 character sheet is built entirely from scratch using HTML, CSS and likely some JavaScript. A PDF looks like a character sheet and can be used to manually record a character, but a Roll20 sheet acts like one online: I.e. it stores data, can generate rolls, and can be referenced by macros. They are two entirely different things, and creating a Roll20 sheet can take anywhere from 20 hours, to months, depending on complexity.