Katana 3.5v5 docs:

Widget Types

Depending on the user parameter defined in a shader's Args File, different Widget Types are available to choose from. The main user parameters are the Number, String, and color parameters. The widget types available for a Number shader parameter are shown below.

The widget types for a String shader parameter are shown below.

The widget types and widget hint values for the different user parameters are shown in the table below:

Widget Type	Widget Hint Values	Description and Example
Number, String, Button, Toolbar, TeleParameter, and Node Drop Proxy
Boolean	boolean	Displays two values or options, such as true or false. <param name="opacity" widget="boolean"/>
Popup	popup	Displays entries specified in the Widget Options in a dropdown menu. <param name="opacity" widget="popup"> <hintlist name="options"> <string value="1.0"/> <string value="1.5"/> <string value="2.0"/> </hintlist> </param>
Mapping Popup Menu	mapper	Similar to Popup Menu, but with the option to map values. See Widget Options for more information. <param name="opacity" widget="mapper"> <hintdict name="options"> <float value="0.0" name="A"/> <float value="0.5" name="B"/> <float value="1.0" name="C"/> </hintdict> </param>
Check Box	checkBox	Similar to Boolean, but displayed as a checkbox. <param name="opacity" widget="checkBox"/>
String, Button, Toolbar, TeleParameter, and Node Drop Proxy
Scene Graph Location	scenegraphLocation	Widget for specifying locations in the Scene Graph tab, for example, /root/world/geo/pony1 <param name="loc" widget="scenegraphLocation"/>
CEL Statement	cel	Specify a CEL Statement. For more information, see Collections and CEL. <param name="loc" widget="cel"/>
Resolution	resolution	A resolution, for example: 1024x768. <param name="loc" widget="resolution"/>
Asset	assetIdInput	Widget to represent an asset. The fields that are displayed in the UI and the browser that is used for selection can be customized using the Asset Management System API. <param name="EnvMap" widget="assetIdInput"/>
File Path	fileInput	String parameter representing a file on disk. Uses the standard Katana file browser for selection. <param name="texname" widget="fileInput"/>
Script Button	scriptButton	A button executing a Python script when clicked. <param scriptText="print 'Hello'" name="btn" buttonText="Run Script" widget="scriptButton"/>
TeleParameter	teleparam	Creates a parameter that 'teleports' parameters from another source (node, SuperTool, or similar). <param name="EnvMap" widget="teleparam"/>
Script Editor	scriptEditor	A field for entering a script as the parameter. <param name="EnvMap" widget="scriptEditor"/>
Dynamic Array	dynamicArray	A number or string array of dynamic size. Not available through the UI wrench menu. <numberarray_parameter hints=" {';widget': ' dynamicArray'}" name="testNumArray" size="3" tupleSize="1"> <number_parameter name="i0" value="0"/> <number_parameter name="i1" value="0"/> <number_parameter name="i2" value="0"/> </numberarray_parameter>
Multi-line Text	text	Enables a string field to support multiple lines of text. For example, you can set KatanaBlinn.args with the following line: <param name="BumpMap" widget="text"/> to set BumpMap to take multiple lines of text and display the expected UI.
String Only
Attribute Name	attributeName	String parameter value which is the full name of an attribute, with names of ancestor group attributes separated by dots: xform.translate
Attribute Type	attributeType	String parameter value which is the name of the attribute's type: float
Group Only
Multi	multi	Creates a group set of parameters within a group.
Number Array Only
Color	color	Creates a color widget that allows you to set the RGB, HSL, and HSV values.
String Array Only
Scene Graph Locations	scenegraphLocationArray	Creates three Scene Graph Locations widgets that allow you to set locations.