These keyboard shortcuts enable you to access various types of help and execute certain menu commands. Keyboard shortcuts are special keys (such as F1 and ESC) that you use either alone or in combination with SHIFT, CTRL, or CTRL+SHIFT. You can use this PDF editor even if you do not have other PDF editing applications installed (for example, Adobe Acrobat). Accounting CS enables you to add annotations, notes, and stamps directly to PDF workpapers that are saved in your engagement binder and to PDF documents that are attached to AP transactions.