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PMA.core incorporates the PMA.UI framework, which includes a versatile viewport for control.
PMA.UI's viewport is web-based and independent; the front-end runs in the webbrowser of your choice. You can use it examine brighfield, fluorescent, and z-stacked slide content from the same environment.
The tile server ships with a default PMA.UI configuration. When embedded in downstream consumers like PMA.studio or in custom scenarios and analytical pipelines however, much more customization is possible.