how do I create a custom profile property

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To create a custom profile property in Mixpanel, follow these steps: 1. Click the plus button to the right of the search bar, then select Event Property or User Property to open the property builder. 2. Optionally give your property a name and click into the formula bar to start defining it. If you're new to this feature, it's recommended to start with one of the examples. Click the Insert Example drop down to populate the box with a use-case specific custom property. 3. When writing your formula, click Ctrl + Space to see a list of all the available functions and their descriptions. Click period (.) to search for event or user profile properties to add to the formula. 4. Custom properties are local to the report by default, when you select Apply. To save the custom property permanently for use in other reports and to make it usable by other project members, click Save. It's recommended to Apply the custom property and use it in your local analysis first, before saving and sharing, to reduce clutter in the project. 5. When you create custom properties and select Save as Custom Property, your created custom property will be private by default. You can also add a description at this stage, so you and your colleagues can know what the custom property is for. You can also decide to save the custom property and share that custom property with specific colleagues, teams or the entire organization by clicking "Save and Share".Please note that the formula used to compose your custom property can't be longer than 20,000 characters.For more details, you can refer to the Mixpanel documentation.

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