You have to make use of the custom properties for the report to change the width of the available value parameter. Follow these steps, to change the width of the available value parameter.
Open the report in our Bold Report Designer.
Open the report properties and click the custom attributes to set the custom properties for the report.
Add custom properties to the report for the parameter as shown in the following images:
To change the width of available value parameter, add the custom property to the report as shown in following image.
The name of the property to change the available value parameter width should be in
SfParam_<<Parameter Name>>_ItemWidth
format.
The width of the available value parameter will be changed to the width value that is specified in the property as shown in following image.