About Microsoft Excel Worksheet and workbook specifications and limits

Open workbooks Limited by available memory and system resources
Worksheet size 1,048,576 rows by 16,384 columns
Column width 255 characters
Row height 409 points
Page breaks 1,026 horizontal and vertical
Total number of characters that a cell can contain 32,767 characters
Characters in a header or footer 255
Sheets in a workbook Limited by available memory (default is 3 sheets)
Colors in a workbook 16 million colors (32 bit with full access to 24 bit color spectrum)
Named views in a workbook Limited by available memory
Unique cell formats/cell styles 64,000
Fill styles 256
Line weight and styles 256
Unique font types 1,024 global fonts available for use; 512 per workbook
Number formats in a workbook Between 200 and 250, depending on the language version of Excel that you have installed
Names in a workbook Limited by available memory
Windows in a workbook Limited by available memory
Hyperlinks in a worksheet 66,530 hyperlinks
Panes in a window 4
Zoom range 10 percent to 400 percent
Sort references 64 in a single sort; unlimited when using sequential sorts
Undo levels 100
Fields in a data form 32
Workbook parameters 255 parameters per workbook
Items displayed in filter drop-down lists 10,000
To Edit cell in excel
  1. Select the CELL and press Function key F2
  2. Select the CELL and Double Click
  3. Select the CELL and click the Formula Bar