diff --git a/napari_aicsimageio/_settings_widget.py b/napari_aicsimageio/_settings_widget.py
new file mode 100644
index 0000000..f41cc9b
--- /dev/null
+++ b/napari_aicsimageio/_settings_widget.py
@@ -0,0 +1,35 @@
+from magicgui import magic_factory
+
+import napari_aicsimageio.core as n_aics_core
+
+
+@magic_factory(
+    delimiter={"label": "Delimiter in scene labels:"},
+    in_mem_size={
+        "label": "Threshold for \
+        <br>out-of-memory loading \
+        <br>(GB)"
+    },
+    frac_mem_size={
+        "label": "Threshold for <br>out-of-memory loading \
+            <br>(% free memory):"
+    },
+    call_button="Apply Reader Settings",
+    info_label=dict(
+        widget_type="Label",
+        label="<h4>For each napari session, \
+            <br>to use the settings: \
+            <br>press the Apply button!</h4>",
+    ),
+    persist=True,
+)
+def set_settings(
+    info_label: str,
+    delimiter: str = n_aics_core.SCENE_LABEL_DELIMITER,
+    in_mem_size: float = n_aics_core.IN_MEM_THRESHOLD_SIZE_BYTES / 1e9,
+    frac_mem_size: int = int(n_aics_core.IN_MEM_THRESHOLD_PERCENT * 100),
+) -> None:
+
+    n_aics_core.SCENE_LABEL_DELIMITER = delimiter
+    n_aics_core.IN_MEM_THRESHOLD_SIZE_BYTES = in_mem_size * 1e9
+    n_aics_core.IN_MEM_THRESHOLD_PERCENT = frac_mem_size / 100
diff --git a/napari_aicsimageio/napari.yaml b/napari_aicsimageio/napari.yaml
index 42a051f..12f347d 100644
--- a/napari_aicsimageio/napari.yaml
+++ b/napari_aicsimageio/napari.yaml
@@ -5,6 +5,13 @@ contributions:
   - id: napari-aicsimageio.get_reader
     title: Get AICSImageIO Reader
     python_name: napari_aicsimageio.core:get_reader
+  - id: napari-aicsimageio.settings_widget
+    title: Open AICSImageIO Reader Settings
+    python_name: napari_aicsimageio._settings_widget:set_settings
+
+  widgets:
+  - command: napari-aicsimageio.settings_widget
+    display_name: AICSImageIO Reader Settings
   readers:
   - command: napari-aicsimageio.get_reader
     filename_patterns: [