sum_range Optional.The actual cells to add, if you want to add cells other than those specified in the range argument. If the sum_range argument is omitted, Excel adds the cells that are specified in the range argument (the same cells to which the criteria is applied).. Sum_range should be the same size and shape as range.If it isn't, performance may suffer, and the formula will sum a range of ...

Try it! Create custom signatures that can be automatically added to your email messages. Email signatures can include text, images, your electronic business card, a logo, or even your handwritten signature.

Under Proofing, if your language shows as Installed, you're ready to go.Otherwise press Not installed and Office will take you to a page where you can download the necessary Language Accessory Pack for that language. Follow the instructions on that page to download and install the pack, then come back to the Office Language Preferences dialog box to confirm that it's now installed.

检查你的版本. DirectX 是许多 Windows 游戏都需要的一种多媒体技术套件。 如果你的电脑未安装正确版本的 DirectX（产品包装盒上应标有所需的版本），游戏可能无法正常运行。

Elevate your device by showcasing beautiful images from around the globe with Windows spotlight, or your favorite memories with a custom photo or a dynamic slide show as your lock screen background.. Stay informed and efficient with dynamic updates that bring weather, finance, sports, traffic, and app notifications right to your lock screen.

If your printer isn't in the list, next to The printer that I want isn't listed, select Add manually, and then follow the instructions to add it manually using one of the options. If you’re not able to connect the printer manually, try to fix the problem by using the steps in Fix printer connection and printing problems in Windows .

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Note: If you don't have the Surface app installed, you can download the Surface app from the Microsoft Store. When it has downloaded, select Start , search for Surface, then select the app from the list of results. Look in Settings for Windows 11.

Important: Section breaks are different from page breaks.If you already have a page break before the page where you want to change the header or footer, remove a page break and replace it with a section break as shown below.

Start page numbering on Page 3 - double-sided printing. If the first page of your document is a cover page, the second page is a table of contents, and you want the third page to show “Page 1”, see Start page numbering on Page 3 - double-sided printing.