A notepad computer is disclosed with a page display region displaying a page of a document on which a user can write using a pen. Associated with the page is an interface useable with the pen including a core task tool region where tool icons are partially visible until the pen is brought near a tool icon. A radial menu pops up at an edge of the document where menu choices are located in a semi-circle away from the edge. A page flipping tool is also provided. A page scrolling tool is further provided that, when activated, includes an implicit button allowing scrolling in one implied direction. A stack region adjacent to the page display region has stack icons each representing a stack of documents. A typing tool is also provided overlaying a portion of the page and including a writing zone and a page zone.