diff --git a/tabulous/_qt/_table/_base/_table_wrappers.py b/tabulous/_qt/_table/_base/_table_wrappers.py
index 1b7de885..b84054f8 100644
--- a/tabulous/_qt/_table/_base/_table_wrappers.py
+++ b/tabulous/_qt/_table/_base/_table_wrappers.py
@@ -84,7 +84,9 @@ def __init__(
         _layout.addWidget(sizegrip, False, Qt.AlignmentFlag.AlignRight)
 
         self.setLayout(_layout)
-        _screen_rect = QtGui.QGuiApplication.primaryScreen().geometry()
+        _screen_rect = QtGui.QGuiApplication.screenAt(
+            parent.mapToGlobal(parent.geometry().topLeft())
+        ).geometry()
         _screen_center = _screen_rect.center()
         self.resize(int(_screen_rect.width() * 0.8), int(_screen_rect.height() * 0.8))
         self.move(_screen_center - self.rect().center())
diff --git a/tabulous/_qt/_table_stack/_finder.py b/tabulous/_qt/_table_stack/_finder.py
index e8b129ba..3184a080 100644
--- a/tabulous/_qt/_table_stack/_finder.py
+++ b/tabulous/_qt/_table_stack/_finder.py
@@ -165,6 +165,8 @@ def findNext(self) -> None:
         qtable.moveToItem(r + 2, c + 2)
         qtable.moveToItem(r, c)
         qtable.setSelections([(r, c)])
+        index = qtable._qtable_view.model().index(r, c)
+        qtable._qtable_view.scrollTo(index)
         self._current_index = (r, c)
         return
 
@@ -185,6 +187,8 @@ def findPrevious(self) -> None:
         qtable.moveToItem(r + 2, c + 2)
         qtable.moveToItem(r, c)
         qtable.setSelections([(r, c)])
+        index = qtable._qtable_view.model().index(r, c)
+        qtable._qtable_view.scrollTo(index)
         self._current_index = (r, c)
         return
 
diff --git a/tabulous/_slice_op.py b/tabulous/_slice_op.py
index 1c6ea8e3..f185ed46 100644
--- a/tabulous/_slice_op.py
+++ b/tabulous/_slice_op.py
@@ -1,5 +1,7 @@
 from __future__ import annotations
 
+import numpy as np
+
 # utility functions for working with slices
 
 
@@ -51,11 +53,17 @@ def as_sized(sl: slice, size: int, allow_negative: bool = False):
 def fmt(sl: slice) -> str:
     """Format a slice as a string."""
     if isinstance(sl, slice):
-        s0 = repr(sl.start) if sl.start is not None else ""
-        s1 = repr(sl.stop) if sl.stop is not None else ""
+        s0 = _repr(sl.start) if sl.start is not None else ""
+        s1 = _repr(sl.stop) if sl.stop is not None else ""
         return f"{s0}:{s1}"
-    return repr(sl)
+    return _repr(sl)
 
 
 def has_none(sl: slice):
     return sl.start is None or sl.stop is None
+
+
+def _repr(x) -> str:
+    if isinstance(x, np.number):
+        return str(x)
+    return repr(x)