The Clear button lets you either clear the value, or just clear cell formatting.
A. Use these buttons to quickly adjust the visual style of your entire sheet. You can regulate the fonts and colors, and use the Themes section to quickly apply it to every table, PivotTable, and SmartArt element for a clean, well_designed sheet.
E. Numbers_based Format Settings: A drop_down menu has options for number formatting. For example, currency places everything you select into “Ũᇸ” format, and percent turns Ǒ or ½ into “50%”, date options. These are the basic format options, but you can select More Number Formats from the drop_down menu to get more specialty use cases (different countries currencies, or adding the “(xxx)xxx_xxxx” formatting to phone number sequences). Often, you may use these tools on entire columns to make all data in one category behave the same way.
C. Spreadsheet Work Area: By default the work area is a grid. Along the top are column headers A through Z (and beyond), and along the left side are numbered row headers. Each rectangle in the spreadsheet is called a cell, and they are each named according to their column letter and row number. For example, the cell selected here is A3.