diff --git a/src/viewer/pages/prep_sMRI_dicomtonifti.py b/src/viewer/pages/prep_sMRI_dicomtonifti.py
index 7b7e2ae..b378465 100644
--- a/src/viewer/pages/prep_sMRI_dicomtonifti.py
+++ b/src/viewer/pages/prep_sMRI_dicomtonifti.py
@@ -61,9 +61,10 @@ def help_working_dir():
                 """
             )
 
-        if st.button('Get help 🤔', key='key_btn_working_dir'):
-            help_working_dir()
-
+        col1, col2 = st.columns([0.5, 0.1])
+        with col2:
+            if st.button('Get help 🤔', key='key_btn_working_dir', use_container_width=True):
+                help_working_dir()
 
 def panel_indicoms() -> None:
     """
@@ -128,8 +129,10 @@ def help_in_dicoms():
                 """
             )
 
-        if st.button('Get help 🤔', key='key_btn_help_in_dicoms'):
-            help_in_dicoms()
+        col1, col2 = st.columns([0.5, 0.1])
+        with col2:
+            if st.button('Get help 🤔', key='key_btn_help_in_dicoms', use_container_width=True):
+                help_in_dicoms()
 
 def panel_detect() -> None:
     """
@@ -182,8 +185,10 @@ def help_detect_series():
                 """
             )
 
-        if st.button('Get help 🤔', key='key_btn_help_detect_series'):
-            help_detect_series()
+        col1, col2 = st.columns([0.5, 0.1])
+        with col2:
+            if st.button('Get help 🤔', key='key_btn_help_detect_series', use_container_width=True):
+                help_detect_series()
 
 
 def panel_extract() -> None:
@@ -266,8 +271,10 @@ def help_extract_nifti():
                 """
             )
 
-        if st.button('Get help 🤔', key='key_btn_help_extract_nifti'):
-            help_extract_nifti()
+        col1, col2 = st.columns([0.5, 0.1])
+        with col2:
+            if st.button('Get help 🤔', key='key_btn_help_extract_nifti', use_container_width=True):
+                help_extract_nifti()
 
 
 def panel_view() -> None:
@@ -353,8 +360,9 @@ def panel_view() -> None:
             ):
                 with blocks[i]:
                     ind_view = utilni.img_views.index(tmp_orient)
+                    size_auto = True
                     utilst.show_img3D(
-                        img, ind_view, img_bounds[ind_view, :], tmp_orient
+                        img, ind_view, img_bounds[ind_view, :], tmp_orient, size_auto
                     )
 
 
diff --git a/src/viewer/utils/utils_st.py b/src/viewer/utils/utils_st.py
index c76eee9..0122003 100644
--- a/src/viewer/utils/utils_st.py
+++ b/src/viewer/utils/utils_st.py
@@ -10,7 +10,7 @@
 # from wfork_streamlit_profiler import Profiler
 # import pyinstrument
 
-COL_LEFT = 3
+COL_LEFT = 5
 COL_RIGHT_EMPTY = 0.01
 COL_RIGHT_BUTTON = 1
 
@@ -88,7 +88,7 @@ def user_input_filename(
     path_dir = path_last
     tmpcol = st.columns((COL_LEFT, COL_RIGHT_BUTTON), vertical_alignment="bottom")
     with tmpcol[1]:
-        if st.button(label_btn, key=f"key_btn_{key_st}"):
+        if st.button(label_btn, key=f"key_btn_{key_st}", use_container_width=True):
             # path_curr, path_dir = utilio.browse_file(path_dir)
             out_file = utilio.browse_file(path_dir)
             if out_file is not None and os.path.exists(out_file):
@@ -122,7 +122,7 @@ def user_input_foldername(
 
     # Button to select folder
     with tmpcol[1]:
-        if st.button(label_btn, key=f"btn_{key_st}"):
+        if st.button(label_btn, key=f"btn_{key_st}", use_container_width=True):
             out_str = utilio.browse_folder(path_last)
 
     if out_str is not None and os.path.exists(out_str):
@@ -151,7 +151,11 @@ def user_input_foldername(
 
 
 def show_img3D(
-    img: np.ndarray, scroll_axis: Any, sel_axis_bounds: Any, img_name: str
+    img: np.ndarray,
+    scroll_axis: Any,
+    sel_axis_bounds: Any,
+    img_name: str,
+    size_auto: bool,
 ) -> None:
     """
     Display a 3D img
@@ -167,17 +171,25 @@ def show_img3D(
     )
 
     # Extract the slice and display it
-    w_img = (
-        st.session_state.mriview_const["w_init"]
-        * st.session_state.mriview_var["w_coeff"]
-    )
-    if scroll_axis == 0:
-        # st.image(img[slice_index, :, :], use_column_width=True)
-        st.image(img[slice_index, :, :], width=w_img)
-    elif scroll_axis == 1:
-        st.image(img[:, slice_index, :], width=w_img)
+    if size_auto:
+        if scroll_axis == 0:
+            st.image(img[slice_index, :, :], use_column_width=True)
+        elif scroll_axis == 1:
+            st.image(img[:, slice_index, :], use_column_width=True)
+        else:
+            st.image(img[:, :, slice_index], use_column_width=True)
     else:
-        st.image(img[:, :, slice_index], width=w_img)
+        w_img = (
+            st.session_state.mriview_const["w_init"]
+            * st.session_state.mriview_var["w_coeff"]
+        )
+        if scroll_axis == 0:
+            # st.image(img[slice_index, :, :], use_column_width=True)
+            st.image(img[slice_index, :, :], width=w_img)
+        elif scroll_axis == 1:
+            st.image(img[:, slice_index, :], width=w_img)
+        else:
+            st.image(img[:, :, slice_index], width=w_img)
 
 
 def util_panel_workingdir(app_type: str) -> None: