diff --git a/src/uproot/interpretation/__init__.py b/src/uproot/interpretation/__init__.py
index 5cde64fea..0f15788b4 100644
--- a/src/uproot/interpretation/__init__.py
+++ b/src/uproot/interpretation/__init__.py
@@ -56,6 +56,17 @@ def numpy_dtype(self):
         """
         raise AssertionError
 
+    @staticmethod
+    def _make_context(context, index_format, header, tobject_header, breadcrumbs):
+        if context is None:
+            context = {}
+        context["index_format"] = "i64"
+        context["header"] = False
+        context["tobject_header"] = True
+        context["breadcrumbs"] = ()
+
+        return context
+
     def awkward_form(self, file, context):
         """
         Args:
diff --git a/src/uproot/interpretation/grouped.py b/src/uproot/interpretation/grouped.py
index ecf6f864b..5b8ac4b35 100644
--- a/src/uproot/interpretation/grouped.py
+++ b/src/uproot/interpretation/grouped.py
@@ -84,7 +84,18 @@ def typename(self):
                 )
             )
 
-    def awkward_form(self, file, context):
+    def awkward_form(
+        self,
+        file,
+        context=None,
+        index_format="i64",
+        header=False,
+        tobject_header=True,
+        breadcrumbs=(),
+    ):
+        context = self._make_context(
+            context, index_format, header, tobject_header, breadcrumbs
+        )
         awkward = uproot.extras.awkward()
         names = []
         fields = []
diff --git a/src/uproot/interpretation/numerical.py b/src/uproot/interpretation/numerical.py
index 047199db0..efc7423e7 100644
--- a/src/uproot/interpretation/numerical.py
+++ b/src/uproot/interpretation/numerical.py
@@ -249,7 +249,18 @@ def inner_shape(self):
     def numpy_dtype(self):
         return self._to_dtype
 
-    def awkward_form(self, file, context):
+    def awkward_form(
+        self,
+        file,
+        context=None,
+        index_format="i64",
+        header=False,
+        tobject_header=True,
+        breadcrumbs=(),
+    ):
+        context = self._make_context(
+            context, index_format, header, tobject_header, breadcrumbs
+        )
         awkward = uproot.extras.awkward()
         d, s = _dtype_shape(self._to_dtype)
         out = uproot._util.awkward_form(d, file, context)
@@ -624,7 +635,18 @@ def to_dtype(self):
     def typename(self):
         return "Double32_t" + "".join("[" + str(dim) + "]" for dim in self._to_dims)
 
-    def awkward_form(self, file, context):
+    def awkward_form(
+        self,
+        file,
+        context=None,
+        index_format="i64",
+        header=False,
+        tobject_header=True,
+        breadcrumbs=(),
+    ):
+        context = self._make_context(
+            context, index_format, header, tobject_header, breadcrumbs
+        )
         awkward = uproot.extras.awkward()
         out = awkward.forms.NumpyForm(
             (),
@@ -683,7 +705,18 @@ def to_dtype(self):
     def typename(self):
         return "Float16_t" + "".join("[" + str(dim) + "]" for dim in self._to_dims)
 
-    def awkward_form(self, file, context):
+    def awkward_form(
+        self,
+        file,
+        context=None,
+        index_format="i64",
+        header=False,
+        tobject_header=True,
+        breadcrumbs=(),
+    ):
+        context = self._make_context(
+            context, index_format, header, tobject_header, breadcrumbs
+        )
         awkward = uproot.extras.awkward()
         out = awkward.forms.NumpyForm(
             (),
diff --git a/src/uproot/interpretation/objects.py b/src/uproot/interpretation/objects.py
index 16f85da56..53d4cbd0e 100644
--- a/src/uproot/interpretation/objects.py
+++ b/src/uproot/interpretation/objects.py
@@ -104,7 +104,18 @@ def typename(self):
         else:
             return uproot.model.classname_decode(self._model.__name__)[0]
 
-    def awkward_form(self, file, context):
+    def awkward_form(
+        self,
+        file,
+        context=None,
+        index_format="i64",
+        header=False,
+        tobject_header=True,
+        breadcrumbs=(),
+    ):
+        context = self._make_context(
+            context, index_format, header, tobject_header, breadcrumbs
+        )
         if isinstance(self._model, type):
             return self._model.awkward_form(self._branch.file, context)
         else:
@@ -425,7 +436,18 @@ def __eq__(self, other):
     def numpy_dtype(self):
         return numpy.dtype(object)
 
-    def awkward_form(self, file, context):
+    def awkward_form(
+        self,
+        file,
+        context=None,
+        index_format="i64",
+        header=False,
+        tobject_header=True,
+        breadcrumbs=(),
+    ):
+        context = self._make_context(
+            context, index_format, header, tobject_header, breadcrumbs
+        )
         awkward = uproot.extras.awkward()
         cname = uproot.model.classname_decode(self._model.__name__)[0]
         form = _strided_awkward_form(awkward, cname, self._members, file, context)
diff --git a/src/uproot/interpretation/strings.py b/src/uproot/interpretation/strings.py
index fc4b6e60d..789ebe1ed 100644
--- a/src/uproot/interpretation/strings.py
+++ b/src/uproot/interpretation/strings.py
@@ -119,7 +119,18 @@ def typename(self):
     def numpy_dtype(self):
         return numpy.dtype(object)
 
-    def awkward_form(self, file, context):
+    def awkward_form(
+        self,
+        file,
+        context=None,
+        index_format="i64",
+        header=False,
+        tobject_header=True,
+        breadcrumbs=(),
+    ):
+        context = self._make_context(
+            context, index_format, header, tobject_header, breadcrumbs
+        )
         awkward = uproot.extras.awkward()
         return awkward.forms.ListOffsetForm(
             context["index_format"],