# FxDynamicParameterAPI_v3 Allows your plugin to create parameters on-the-fly. ``` protocol FxDynamicParameterAPI_v3 ``` ## Overview With this API your plugin can create and remove parameters outside of its `-addParameters` method. It can also get and set various properties of parameters during run-time, as well, such as the minimum and maximum allowable values. ## Topics ### Instance Methods [`func parameter(UInt32, floatMinimum: UnsafeMutablePointer!, maximum: UnsafeMutablePointer!, sliderMinimum: UnsafeMutablePointer!, sliderMaximum: UnsafeMutablePointer!) -> (any Error)!`](/documentation/professional_video_applications/FxDynamicParameterAPI_v3/parameter(_:floatMinimum:maximum:sliderMinimum:sliderMaximum:)) Get a parameter’s bounds as floating point values. [`func parameter(UInt32, intMinimum: UnsafeMutablePointer!, maximum: UnsafeMutablePointer!, sliderMinimum: UnsafeMutablePointer!, sliderMaximum: UnsafeMutablePointer!) -> (any Error)!`](/documentation/professional_video_applications/FxDynamicParameterAPI_v3/parameter(_:intMinimum:maximum:sliderMinimum:sliderMaximum:)) Get a parameter’s bounds as integer values. [`func parameter(UInt32, name: AutoreleasingUnsafeMutablePointer!) -> (any Error)!`](/documentation/professional_video_applications/FxDynamicParameterAPI_v3/parameter(_:name:)) Get a parameter’s name. [`func parameterCount() -> UInt32`](/documentation/professional_video_applications/FxDynamicParameterAPI_v3/parameterCount()) Returns the number of parameters your plug-in currently has. [`func parameterID(at: UInt32) -> UInt32`](/documentation/professional_video_applications/FxDynamicParameterAPI_v3/parameterID(at:)) Returns the ID of the parameter at the given index. [`func removeParameter(UInt32) -> (any Error)!`](/documentation/professional_video_applications/FxDynamicParameterAPI_v3/removeParameter(_:)) Removes the parameter with the passed-in ID. [`func setAsDefaultsAt(CMTime) throws`](/documentation/professional_video_applications/FxDynamicParameterAPI_v3/setAsDefaultsAt(_:)) Tell the host app that the settings at the given time should be considered the default settings for every parameter in the plug-in. [`func setParameter(UInt32, floatMinimum: Double, maximum: Double, sliderMinimum: Double, sliderMaximum: Double) -> (any Error)!`](/documentation/professional_video_applications/FxDynamicParameterAPI_v3/setParameter(_:floatMinimum:maximum:sliderMinimum:sliderMaximum:)) Set a parameter’s bounds using floating point values. [`func setParameter(UInt32, intMinimum: Int32, maximum: Int32, sliderMinimum: Int32, sliderMaximum: Int32) -> (any Error)!`](/documentation/professional_video_applications/FxDynamicParameterAPI_v3/setParameter(_:intMinimum:maximum:sliderMinimum:sliderMaximum:)) Set a parameter’s bounds using integer values. [`func setParameter(UInt32, name: String!) -> (any Error)!`](/documentation/professional_video_applications/FxDynamicParameterAPI_v3/setParameter(_:name:)) Set a parameter with a name. [`func setPopupMenuParameter(UInt32, entries: [Any]!, defaultValue: UInt32) -> (any Error)!`](/documentation/professional_video_applications/FxDynamicParameterAPI_v3/setPopupMenuParameter(_:entries:defaultValue:)) Set the menu entries in a pop-up menu. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)