--- schema_version: "1" id: f966b78cdf519cc8a884bc0251997ab6da3a9ee2ed5b018484aedb04d7002aeb title: setSoftphonePanelWidth() for Lightning Experience collection: developer version: current locale: en-us portal_url: https://docs.salesforce.com/developer/current/en-us/service-cloud/api-cti/guides/sforce-api-cti-setsoftphonepanelwidth-lex.md canonical_url: https://developer.salesforce.com/docs/service/api-cti/guide/sforce-api-cti-setsoftphonepanelwidth-lex.html source_site: developer.salesforce.com content_type: documentation content_hash: 34782ce8088eac862cdd8649706d1cffbd92e22e14b1ec50761badc8ff0a06a1 products: - Open CTI Developer Guide - Service Cloud Developer Content --- # setSoftphonePanelWidth() for Lightning Experience ## Usage Sets the softphone panel width in the utility bar. The width must be specified in pixels. This method is available in API version 38.0 or later. ## Syntax ```javascript sforce.opencti.setSoftphonePanelWidth({ widthPX:WIDTH, callback:FUNCTION //Optional }); ``` ## Arguments |Name|Type|Description| |------|------|-------------| |`widthPX`|number|The softphone panel width in pixels. The height must be a number from 200 through 1,920.| |`callback`|function|JavaScript method executed when the API method call is completed.| ## Sample Code–HTML and JavaScript ```html ``` ## Response This method is asynchronous. The response is returned in an object passed to a callback method. The response object contains the following fields. |Name|Type|Description| |------|------|-------------| |`success`|boolean|Returns `true` if the API method call was invoked successfully, `false` otherwise.| |`returnValue`|object|This API method doesn’t return this object. The `returnValue` is always `null`.| |`errors`|array|If the API call was successful, this variable is `null`. If the API call failed, this variable returns an array of [error messages](https://developer.salesforce.com/docs/service/api-cti/guide/sforce-api-cti-error-messages-lightning.md).|