Hello @Paula Henderson,
Thank you for taking time to post this issue in Microsoft Q&A forum.
As Visual Studio(VS IDE) and Visual Studio Code(VS Code) are two different products, their extensions are usually different. May I firstly confirm, if you are using this extension: Live Preview? If so, it’s an extension for VS Code, not for VS IDE.
If you are using VS Code, the preview option should be there when you right-click one of the web pages. For example, I tested with a single .html file, see following screenshot:
If you are using VS IDE, then maybe you mean the integrated Web Live Preview feature? If so, you may need to use it in ASP .NET Web applications. You can right-click one of the web pages, select "View in Browser" or "Browse With…"(choose the Internal Web Browser or other web browsers, click Browse button) to live preview this web page.
Don't forget to enable web live preview feature and restart VS(Tools > Options > Web Forms Designer > General >Web Forms designer (requires restart) > Web Live Preview).
For example, tested with an ASP .NET Web application(.NET Framework, Web Forms):
Above is for VS 2022, if you are using VS 2019, you should follow the guidance here to enable it:
If you still fail to see the corresponding options, please kindly share us some screenshots to confirm the issue and check further.
Please don’t hesitate to contact us.
Sincerely,
Tianyu
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