Hello @Kathleen Galbraith
May I know if the Power BI Cloud you’re referring to is the Power BI web version? If so, you can try opening the semantic model for your dataset, switch mode from View to Edit, then you can use button new measure from ribbon.


If you’re using Power BI Desktop, you can refer to AI.

You may also want to review that you have the required permissions on the report/dataset (for example, Edit permission, and that the dataset allows model editing or preview features are enabled).
Please note that this forum is not specific to Power BI, and this guidance is based on my experience. For more targeted assistance, you may consider posting your question in the dedicated Power BI forum here: https://community.fabric.microsoft.com/t5/Power-BI-forums/ct-p/powerbi
Hope this info helpful.
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