diff --git a/src/uproot_browser/tree.py b/src/uproot_browser/tree.py
index c9330c2..bf89dc5 100644
--- a/src/uproot_browser/tree.py
+++ b/src/uproot_browser/tree.py
@@ -10,6 +10,8 @@
 from typing import Any
 
 import uproot
+import uproot.behaviors
+import uproot.interpretation
 import uproot.reading
 from rich.console import Console
 from rich.markup import escape
@@ -65,8 +67,9 @@ def label(self) -> Text:
 
     def tree_args(self) -> dict[str, Any]:
         d: dict[str, Text | str] = {"label": self.label()}
-        if "guide_style" in self.meta():
-            d["guide_style"] = self.meta()["guide_style"]
+        meta = self.meta()
+        if "guide_style" in meta:
+            d["guide_style"] = meta["guide_style"]
         return d
 
     @property
@@ -84,7 +87,10 @@ def children(self) -> list[UprootEntry]:
         else:
             items = {obj.name.split(";")[0] for obj in self.item.branches}
         return [
-            UprootEntry(f"{self.path}/{key}", self.item[key]) for key in sorted(items)
+            UprootEntry(
+                key if self.path == "/" else f"{self.path}/{key}", self.item[key]
+            )
+            for key in sorted(items)
         ]
 
 
@@ -108,6 +114,7 @@ def process_item(uproot_object: Any) -> MetaDict:
     """
     name = getattr(uproot_object, "name", "<unnamed>")
     classname = getattr(uproot_object, "classname", uproot_object.__class__.__name__)
+    assert isinstance(classname, str)
     label_text = Text.assemble(
         (f"{name} ", "bold"),
         (classname, "italic"),
diff --git a/src/uproot_browser/tui/browser.css b/src/uproot_browser/tui/browser.css
index 7c41d8a..ee8cfff 100644
--- a/src/uproot_browser/tui/browser.css
+++ b/src/uproot_browser/tui/browser.css
@@ -46,6 +46,14 @@ Browser.-show-tree #tree-view {
     content-align: center middle;
 }
 
+#plot-input-container {
+    height: 3;
+}
+
+#plot-button {
+    dock: right;
+}
+
 
 Footer > .footer--highlight {
     background: $secondary-darken-2;
diff --git a/src/uproot_browser/tui/browser.py b/src/uproot_browser/tui/browser.py
index 4cb5c1a..631974b 100644
--- a/src/uproot_browser/tui/browser.py
+++ b/src/uproot_browser/tui/browser.py
@@ -86,6 +86,10 @@ def compose(self) -> textual.app.ComposeResult:
                 id="main-view",
                 initial="logo",
             )
+            with textual.containers.Container(id="plot-input-container"):
+                yield textual.widgets.Input(id="plot-input")
+                yield textual.widgets.Button("Plot", id="plot-button")
+
         yield textual.widgets.Footer()
 
     def on_mount(self, _event: textual.events.Mount) -> None:
@@ -147,6 +151,9 @@ def on_uproot_selected(self, message: UprootSelected) -> None:
             make_plot(message.upfile[message.path], theme, 20)
             self.plot_widget.item = Plotext(message.upfile, message.path, theme)
             content_switcher.current = "plot"
+            self.query_one(
+                "#plot-input", textual.widgets.Input
+            ).value = f"f[{message.path!r}]"
 
         except EmptyTreeError:
             content_switcher.current = "empty"
diff --git a/src/uproot_browser/tui/right_panel.py b/src/uproot_browser/tui/right_panel.py
index 994af3d..3375b49 100644
--- a/src/uproot_browser/tui/right_panel.py
+++ b/src/uproot_browser/tui/right_panel.py
@@ -12,6 +12,7 @@
 import textual.widget
 import textual.widgets
 
+import uproot_browser.dirs
 import uproot_browser.plot
 
 LOGO = """\