You can copy and paste formatting between any two worksheets within the same workbook or across workbooks, even if they use different data sources. Formatting that applies to specific fields copies over only if those fields exist in the target workbook.
Step 1
Select the worksheet that has the formatting you want to copy.

Step 2
For Tableau Desktop 7.0 and later, select Format > Copy Formatting.
For Tableau Desktop 6.1 and earlier, select Edit > Copy Formatting.

Step 3
Select the worksheet to which you want to copy the formatting.

Step 4
For Tableau Desktop 7.0 and later, select Format > Paste Formatting.
For Tableau Desktop 6.1 and earlier, select Edit > Paste Formatting.

The formatting of worksheet elements that correspond to elements in the target workbook is applied.

You can also copy and paste formatting using the worksheet tabs along the bottom of the workbook.
Right-click the worksheet tab and select Copy. Then in the new workbook, you can select one or more worksheets to apply the formatting to. This is a really easy way to copy formatting to an entire workbook.

Copying formatting does not copy manual sizing, zoom settings, or default label orientation. Also, if you apply formatting to individual reference lines and annotations, it is not copied to the new worksheet.