If you frequently use custom number formats, you have probably been frustrated that each time you need to use them in another workbook, you have to recreate them from scratch.
Well, here’s a way to make your custom number formats instantly available in all of your new workbooks.
1) Open a blank workbook;
2) Delete all sheet tabs except for Sheet1;
3) Define all of your favourite custom number formats in this sheet. While you’re at it, you can also change the default cell format and Print Settings
5) Select cell A1 to make it the active cell for each new sheet;
6) Next, you need to save this custom worksheet as the default worksheet template in the XLSTART folder. From the File tab, click Save As. (In Excel 2007, click the Office Button, Save As, Other Formats). In the Save as Type dropdown on the bottom of the dialog box, select Excel Template (*.xltx). Next, type or ‘copy and paste’ %APPDATA%\Microsoft\Excel\XLSTART into the File Name field and press Enter to open the XLSTART folder. Change the suggested file name to SHEET.XLTX. This will be the default sheet used when you insert a worksheet into a workbook;
Note: If you prefer your new workbooks to have more than one sheet, copy the current sheet by holding down the CTRL key and dragging the sheet tab to the right and releasing the button. Rename the new sheet tabs to Sheet 2, Sheet 3, etc…;
7) Now you will save this same custom worksheet as your default ‘workbook’ template just by saving it with a different file name. To do this, simply repeat Step 6 but this time save the workbook with the filename BOOK.XLTX.
From now on, whenever you open a new workbook or insert a sheet into a workbook, all of your custom setting will already be there for you. No more need to recreate these settings every time.