Use this dialog to save your Data operator or test as a preset or operator; in the latter case, it appears in the Particle View depot after you quit and restart 3ds Max.
For an example of how to use Expose Parameters, see Advanced Data Manipulation Quick Start Tutorial. A saved preset or custom operator takes the form of a file with the extension .pfp (Particle Flow Preset), saved in the folder [3dsmax root]\plugcfg_In\ParticleFlowDataPresets\. To remove a preset or operator, navigate to this folder and delete the file.
If you save a preset in a particular category, the software creates a subfolder with this name, and places the preset there. By reorganizing folders in the Particle Flow Data Presets folder, you can reorganize the category organization for the presets.
A Data operator, besides the wired network of suboperators, has some common parameters that are shown in its rollout in Particle View, in the Operator Activity and, for Data Icon and Data Icon Test, Operator Icon groups. If these parameters should be shown in your custom operator, you can turn on Activity or Icon or both. If you don't expose these parameters, then only controls you expose explicitly with Expose Parameters will be available.
Use these controls to specify an icon or icons for your custom operator or test. Choose one of the predefined Active icons (each also has an accompanying Inactive and Depot version), or specify images for a custom icon.
Uses the icon from the currently loaded preset, if any.