Bringing Intuitive Input Controls to The Web Spreadsheet User Experience Introducing specialized input methods in clickable cells to improve the user experience while entering complex data. by Introduction A spreadsheet is a particularly useful way to display and exploit tabular data, or just formatted content. Generally, the user will fill in data simply by typing it and modify the properties of cells using the sheet controls. However, some data types can be challenging for free typing. A date can be easily misinterpreted if the format is incorrect for example. Or you may need the user to freehand a signature before printing.